八年级时间状语从句教案

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初中英语八下人教版课程状语从句时间状语从句引导词状语从句时间状语

初中英语八下人教版课程状语从句时间状语从句引导词状语从句时间状语

初中英语八下人教版课程状语从句时间状语从句引导词状语从句时间状语时间状语从句是一个非常重要的语法点,用于描述动作发生的时间。

以下是初中英语八年级下册(人教版)中关于时间状语从句的引导词和例句:- when:当...时候- I was watching TV when my mother came back home.(当我妈妈回家时,我正在看电视。

)- while:当...时候,在...期间- While I was doing my homework, my sister was playing the piano.(当我在做作业时,我妹妹在弹钢琴。

)- before:在...之前- I will finish my homework before I go to bed.(我会在睡觉前完成我的家庭作业。

)- after:在...之后- I went to bed after I finished my homework.(我完成家庭作业后去睡觉了。

)- as soon as:一...就...- I will call you as soon as I arrive at the airport.(我一到机场就会给你打电话。

)- until:直到- I didn't go to bed until my father came back home.(直到我爸爸回家我才去睡觉。

)- since:自从- I have lived in this city since I was born.(自从我出生以来,我一直住在这个城市。

)这些引导词在时间状语从句中起到连接主句和从句的作用,帮助我们更准确地描述动作发生的时间顺序。

英语:Unit 3教案(人教新目标八年级下)

英语:Unit 3教案(人教新目标八年级下)

英语:Unit 3教案(人教新目标八年级下)学习方式:自主、合作学习情感目标:通过当飞碟的降临,对人们各自正在忙于自己的事如何用英语来表达自己正在所做的事情.课前任务:Task1.请同学们回家调查家庭成员在过去的某个时第一课时教学内容与分析教学内容:Section A (1): 1a---1c教学目标:1.能够掌握基本单词和词汇。

2.学会过去进行时的基本结构与用法。

3.能够运用以when 引导的时间状语从句。

4.能够运用基本句型进行提问。

学习任务:我的爱好目的:通过学生小组活动,调查在过去的不同时间里做不同的事情,学会使用过去进行时态,培养学生应用英语进行交际的能力。

语言技能:Listening .Speaking .Reading ﹑Writing语言知识:过去进行时的用法及复习一般过去时态提示词语及句型:got out, cut, barber shop, bathroom, kitchen, well, bathroomWhat were you doing when the UFO arrived ?I was sitting in the barber’s chair .The barber was cuttingmyhair when they arrived .教学重点、难点分析:教学重点:基本单词,词汇和句型教学难点:能够运用过去进行时谈论人们所做的事情.课前准备1.本课时的教学课件2.课前发给学生表格向学生布置任务:在表格中写出有关内容。

教学设计教学步骤建议和说明Teaching Steps :Step 1 :Warm-up and revision1.Share an English song .2.Greetings and free-talk .从平常的谈话中轻松导入本课句型,信息沟通使谈话非常真实,而又浅显What are you doing ? What did you do last night ?3.Show slides: Revise: is/an/are +动词ing4.Brain storm:Collect the names of activities which said by the students.Step 2 :Presentation :1.Watch a video2.By asking: What’s this in English ?Have you even seen it ?3.Teach:UFO, bedroom, bathroom, bedroom, kitchen,living-room, barber shopStep 3 :Work on:SB Page 18 , 1a .1.Point to the sentences .Read the sentences .Explain what each one means.2.Teach :barber shop, well, bathroom, bedroom, kitchen, get out, cut3.Look at the picture.. Point out the six people. Match the statements with the people in the picture4.Check the answers .5.Practice reading .Step 4 :Work on:SB Page 18 , 1b .1. Read the instructions .Make sure the Ss understand whatthey should do .2. Look at the dialogue in the picture .Explain :过去进行时态的构成: was / were + doing .用法:表示过去某一时刻或某一段时间正在进行的动作,一般用时间状语来表示。

八年级时间状语从句教案

八年级时间状语从句教案

八年级时间状语从句教案一、教学目标:1. 让学生掌握时间状语从句的定义和用法。

2. 培养学生正确运用时间状语从句进行交际的能力。

3. 提高学生对英语语法的理解和应用能力。

二、教学内容:1. 时间状语从句的定义和分类。

2. 时间状语从句的常用连接词。

3. 时间状语从句的倒装现象。

4. 典型例句和练习。

三、教学重点与难点:1. 重点:时间状语从句的定义、分类和用法。

2. 难点:时间状语从句的倒装现象和连接词的运用。

四、教学方法:1. 采用情景教学法,通过设定情境,让学生在实际语境中学习时间状语从句。

2. 运用任务型教学法,让学生在完成任务的过程中,巩固时间状语从句的用法。

3. 采用互动式教学法,引导学生积极参与课堂讨论,提高口语表达能力。

五、教学过程:1. 导入:通过提问方式引导学生回顾一般现在时和一般过去时的用法。

2. 新课讲解:介绍时间状语从句的定义、分类和用法。

3. 例句展示:给出典型例句,让学生理解并模仿。

4. 练习环节:设计相关练习题,让学生巩固所学内容。

5. 课堂互动:组织小组讨论,让学生运用时间状语从句进行口语交流。

6. 总结与作业:对本节课内容进行总结,布置作业,要求学生课后巩固。

教案仅供参考,具体实施时可根据学生实际情况进行调整。

六、教学评估:1. 课堂参与度:观察学生在课堂活动中的参与程度,了解他们对时间状语从句的理解和应用情况。

2. 练习完成情况:检查学生完成的练习题,评估他们对时间状语从句的掌握程度。

3. 口语表达:在课堂互动环节,评估学生的口语表达能力,看他们能否熟练运用时间状语从句进行交流。

七、课后作业:1. 整理课堂所学,编写时间状语从句的笔记。

2. 完成课后练习题,巩固时间状语从句的用法。

3. 结合自己的生活经历,用时间状语从句编写一个简短的故事。

八、教学反思:在课后,对本次教学进行反思,评估教学效果,思考如何改进教学方法,以便更好地帮助学生掌握时间状语从句。

九、拓展活动:1. 组织学生进行时间状语从句的主题演讲,提高他们的口语表达能力。

八年级时间状语从句教案

八年级时间状语从句教案

八年级时间状语从句教案一、教学目标:1. 让学生掌握时间状语从句的定义和用法。

2. 让学生能够正确地运用时间状语从句表达时间背景和动作发生的时间。

3. 提高学生英语句子构建和表达的能力。

二、教学重难点:1. 重点:时间状语从句的定义、结构和用法。

2. 难点:正确运用时间状语从句表达具体场景。

三、教学方法:1. 采用情境教学法,通过设定各种场景,让学生在实际语境中学习、运用时间状语从句。

2. 用例句解析法,分析典型例句,使学生掌握时间状语从句的用法。

3. 采用分组讨论法,让学生分组讨论,共同探讨时间状语从句的运用。

四、教学内容:1. 时间状语从句的定义和结构。

2. 常见的时间状语从句引导词:when, whenever, while, as soon as, before, after, until, since, for等。

3. 各时间状语从句引导词的用法和例句。

五、教学过程:1. 导入:通过提问方式引导学生回顾并列句的概念,为新课学习做铺垫。

2. 讲解:讲解时间状语从句的定义、结构和常见引导词,结合例句进行分析。

3. 练习:让学生用所学的引导词填空,构成时间状语从句,并进行分组讨论。

4. 场景模拟:设置各种场景,让学生运用时间状语从句进行实际操作。

6. 作业布置:布置相关练习题,巩固所学知识。

六、教学反馈:1. 课堂提问:通过提问了解学生对时间状语从句的理解程度。

2. 练习情况:观察学生在练习中的表现,了解他们对时间状语从句的掌握情况。

3. 场景模拟:评估学生在场景模拟中的表现,检验他们运用时间状语从句的能力。

七、教学拓展:1. 对比并列句和时间状语从句的用法,让学生了解两者的区别。

2. 介绍时间状语从句在实际生活中的应用,提高学生英语运用能力。

3. 引导学生关注时间状语从句在其他英语语法中的运用,如条件状语从句、地点状语从句等。

八、教学评估:1. 课堂练习:评估学生在课堂练习中的表现,了解他们对时间状语从句的掌握程度。

八年级英语上册 Unit 3 Lesson 2 exhibitions and museum 时间状语从句教案 牛津深圳版五四制

八年级英语上册 Unit 3 Lesson 2 exhibitions and museum 时间状语从句教案 牛津深圳版五四制
A. before B. after C. until D. unless
2. It seemed only seconds ________ the boy finished washing his face.
A. when B. before C. after D. even if
3. Hardly had he reac hed the school gate ________ the bell rang.
A. as B. before C. since D. when
It __ long before we ___ the result of the experiment.
A. will not be; will know B. is; will know C.will not be ; know D. is; know
Unit 3 Lesson 2 exhibitions and museum时间状语从句
教学目标:
Teaching objectives:
1. Students will be able to master the adverbial clause of time.
时间状语从句
引导时间状语从句的词有when, while, as, before, after, until/till , as soon as, since
since引导的时间状语从句常用一般过去时,其主句一般使用现在完成时。.
注:常用句型:It is +时间段+since从句译为:自从……有多长时间了。
eg.It is six years since she graduated from the university.

人教版八年级英语下册Unit5 教案

人教版八年级英语下册Unit5 教案

Unit 5 What were you doingwhen the rainstorm came?第1课时Section A 1a-2d教学目标一、知识与技能1. 掌握重点词汇和句型:What were you / was he (she) doing when…? I / He / She was doing…when….2. 初步掌握使用过去进行时来询问或描述过去进行的事情,并学会用when描述某动作或某事件的发生。

3. 能在交际过程中较流利地运用所学结构和句型。

4. 提高抓取和记录关键信息的听力技能。

二、过程与方法采用目标和直观教学法,调动学生的积极性,引导他们积极参与课堂。

三、情感态度与价值观让学生爱上英语课堂活动,鼓励他们在课堂上进行合作交流。

教学重点1. 掌握过去进行时态:“was / were + doing”结构。

2. 掌握when 引导的时间状语从句。

教学难点掌握由when引导的时间状语从句以及如何使用过去进行时。

教法导航任务型教学法,情景教学法,交际教学法。

学法导航模仿,讨论与交流。

教学准备图片,多媒体。

教学过程Step 1 GreetingsGreet the students as usual.Step 2 Warming up1Say:Yesterday,there was a rainstorm. I was watching TV when the rainstorm came. Where were you when the rainstorm came? And What were you doing when the rainstorm came? Help the students to answer:I was sleeping when the rainstorm came. I was doing my homework when the rainstorm came….Then show some pictures and ask the students:Where were they and what were they doing when the rainstorm came? Work in pairs and ask and answer like this:A:Where were you when the rainstorm came?B:I was in the library.A:What were you doing when the rainstorm came?B:I was reading a book.Step 3 Practice1a, Where were the people at the time of the rainstorm? Match the statements with the people in the picture.1. _____ I was in the library.2. _____ I was in my house.3._____ I was on the street.4._____ I was at the bus stop.Check the answers together.Step 4 Listening1b, What were they doing when the rainstorm came? Let’s listen. R emind the students to pay attention to “was/were +doing”Listen to the TV report and circle the correct responses.a. doing my homework / studyingb. playing basketball / readingc. going to work / waiting for the busd. walking home / shoppingAfter listening,ask some students to report their answers.Step 5 Speaking1c, Look at the pictures and talk about what the people in 1a were doing at the time of the rainstorm using “was/were + doing”.For example:A:What was the boy doing at the time of the rainstorm?B:He was_____________________.Ask some pairs to act out their dialogue.Step 6 Listening2a, First ask the students to look at the pictures and go through the sentences. Then listen and number the pictures 1-5. Play the recording twice if necessary. Then ask some students to report their answers.2b, Listen again. Fill in the blanks in the sentences in 2a. Then ask some students to2report their answers.Step 7 Pair work2c, Use the information in 2a to retell the story in a conversation between the boy and a TV reporter. Then ask some pairs to act out their dialogue. Before they acting,give the “reporter” a “microphone”.2d, Role play the conversation.Step 8 GameAsk the students to practice in groups. One imitates an action and the other two guess by using the dialogue:A:What was he doing when the rainstorm came? B:He was sleeping.Step 9 Summary1. 在图书馆in the library2. 在…的时候at the time of3. 去上班go to work4. 等公共汽车wait for the bus5. 走路回家walk home6. 在街上on the street7. 拾起,接电话pick up 8.(过去)正在做…was / were doingStep 10 Homework1. Remember the words and phrases in this lesson.2. Finish the exercises in the workbook.课堂作业Fill in the blanks according to the conversation in 2d.Mary:What ______ you doing last night,Linda? I called at seven and you didn’t pick ____.Linda:Oh,I was in the kitchen helping my mom.Mary:I see. I called again at 8 and you didn’t _______ then either.Linda:What was I doing at 8? Oh,I know. When you called,I _____ ______ a shower.Mary:But then I called again at 9.Linda:Oh,I _____ ________ (sleep) at that time.Mary:So early? That’s strange.Linda:Yeah,I was tired. Why _____ you call so many times?Mary:I needed help with my homework. So while you were ________,I called Jenny and she helped me.教学反思教学中,我们可以采用多种手段帮助学生多记单词,多学习语言规则,并尽可能多创造模仿的机会,提高学生的语音和语调。

牛津译林版英语八年级上册Unit2Task优秀教学案例

牛津译林版英语八年级上册Unit2Task优秀教学案例
2.情境创设:每组学生根据讨论的结果,设计一个过去发生的事情的对话场景,并运用过去时态的疑问词和时间状语从句进行对话交流。
(四)总结归纳
1.归纳疑问词和状语从句:引导学生对过去时态疑问词和时间状语从句的用法进行总结,帮助学生梳理和巩固所学知识。
2.强调时态一致性:强调主从句的时态一致性,让学生明白并掌握时间状语从句的连接词以及主从句的时态一致性的重要性。
2.引导学生运用归纳总结的方法,自主探究过去时态疑问词和时间状语从句的用法,提高学生的自主学习能力。
3.运用小组合作学习的方式,让学生在互动交流中practice使用过去时态的疑问词和时间状语从句,提高学生的实际运用能力。
(三)情感态度与价值观
1.培养学生对英语学习的兴趣,让学生感受到学习英语的乐趣,提高学生对英语学科的积极情感。
2.时间状语从句:讲解时间状语从句的连接词,如“when”, “after”, “before”, “as soon as”等,并强调主从句的时态一致性。
3.运用举例:通过具体的例句和情境,展示过去时态疑问词和时间状语从句的用法,让学生进行观察和理解。
(三)学生小组讨论
1.分组讨论:将学生分成小组,每组学生共同讨论和分享关于过去发生的事情的经历,鼓励学生运用过去时态的疑问词和时间状语从句进行交流。
(五)作业小结
1.作业布置:布置相关的练习题目,让学生巩固和应用所学知识,如编写一个过去发生的事情的对话场景,并运用过去时态的疑问词和时间状语从句进行对话交流。
2.学生展示:鼓励学生在下一节课上展示自己的作业成果,让学生互相交流和评价,提高学生的表达能力和交流能力。
五、案例亮点
1.情境创设:通过播放视频和展示图片,引导学生直观地感知过去发生的事情,激发学生对过去时态的疑问词和时间状语从句的兴趣,提高学生的学习积极性。

专题05 时间状语从句-八年级英语下期末专项复习(仁爱版)

专题05 时间状语从句-八年级英语下期末专项复习(仁爱版)

专题05 时间状语从句第一部分语法1. 引导时间状语从句的连词2. when,while,as引导时间状语从句的区别when,while,as显然都可以引导时间状语从句,但用法区别非常大。

①when可以和延续性动词连用,也可以和短暂性动词连用;而while和as只能和延续性动词连用。

Why do you want a new job when you’ve got such a good one already?你已经找到如此好的工作,为何还想再找新的?(get为短暂性动词)Sorry, I was out when you called me.对不起,你打电话时我刚好外出了。

(call为短暂性动词)Strike while the iron is hot.趁热打铁。

(is为延续性动词,表示一种持续的状态)The students took notes as they listened.学生们边听课边做笔记。

(listen为延续性动词)②when从句的谓语动词可以在主句谓语动作之前、之后或同时发生;while和as从句的谓语动作必须是和主句谓语动作同时发生。

a. 从句动作在主句动作前发生,只用when。

When he had finished his homework, he took a short rest. (finished先发生)当他完成作业后,他休息了一会儿。

When I got to the airport, the guests had left. (got to后发生)当我赶到飞机场时,客人们已经离开了。

b. 从句动作和主句动作同时发生,且从句动作为延续性动词时,when,while,as都可使用。

①When / While / As we were dancing, a stranger came in. (dance为延续性动词)当我们跳舞时,一位陌生人走了进来。

②When / While / As she was making a phonecall, I was writing a letter. (make为延续性动词)当她在打电话时,我正在写信。

新人教版八年级英语上册Unit7 教案

新人教版八年级英语上册Unit7 教案

新人教版八年级英语上册Unit7 教案教学目标1. 掌握本单元的词汇和短语,并能正确运用。

2. 能够正确使用一般现在时和一般过去时进行描述。

3. 理解并能够正确运用有关时间状语从句。

4. 能够进行日常活动的对话,并能够流利地用英语表达爱好。

教学内容词汇与短语1. hobbies and interests(爱好和兴趣)2. ork(艺术品)3. museum(博物馆)4. gallery(画廊)5. on display(展出)6. n(展览)7. n(收藏)8. take photos(拍照)9. postcard(明信片)10. relax(放松)11. flight(航班)12. packed(拥挤的)13. mind(注意)14. secondhand(二手的)15. satisfied(满意的)语法1. 一般现在时:描述经常性、惯性的动作或状态。

2. 一般过去时:描述过去发生的动作或存在的状态。

3. 时间状语从句:用来表示不同时间点的事件或动作之间的关系。

教学步骤1. 导入(5分钟)- 通过展示一些图片引起学生对艺术的兴趣。

- 引导学生回忆一些艺术品或博物馆的名字。

2. 词汇与短语研究(10分钟)- 呈现并教授本单元的词汇与短语。

- 让学生进行拼读、理解和运用练。

3. 语法研究(10分钟)- 介绍一般现在时和一般过去时的用法。

- 提供相关的例句和练。

4. 练与交流(15分钟)- 学生以小组为单位进行交流,讨论自己的爱好和兴趣。

- 鼓励学生使用一般现在时进行描述,并提供必要的句子结构和词汇。

5. 时间状语从句(15分钟)- 讲解时间状语从句的概念和用法。

- 提供相关的例句和练。

6. 活动与应用(15分钟)- 学生分角色扮演,模拟在博物馆或画廊中的对话。

- 引导学生使用一般过去时进行表述,并提供必要的句子结构和词汇。

7. 小结与布置作业(5分钟)- 总结本节课的重点内容。

- 布置作业:要求学生根据自己的兴趣和爱好,写一篇短文,并使用所学的语法和词汇。

八年级时间状语从句教案

八年级时间状语从句教案

2013年8 年级下教案第几讲: 9教学课题:Module 8 Public holidays教学目标:1..课文中重点单词、词组、句子的理解与掌握2.课文与单词的朗读与翻译要求掌握3语法:时间状语从句教学重点:课文与单词的朗读与翻译要求掌握教学难点:语法:时间状语从句教学过程:一.Greetings二.Dictation1Words 2 phrases 3 sentences:三.语法——时间状语从句定义:英语中可以用句子表达一件事情或一个行为发生的时间,这个句子就叫时间状语从句。

时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。

1.由when引导的时间状语从句When意为“当…的时候”,when引导的从句的谓语动词可以是延续性的动词,又可以是瞬间动词。

Eg:When the teacher came in, the students stopped talking.He knocked at the door , when my mother was sleeping.2.由while引导的时间状语从句“与…同时,在…期间”,谓语动词必须是延续性动词。

EG:Lucy was cleaning the room while Lily was listening to music.3. 由before/after 引导的时间状语从句,before“在…之前”,after“在…之后”Eg:He went to the office before he visited Mr. Zhong.I called Betty after I finished the homework.4. 由until引导的时间状语从句,“直到…为止”,not until “直到…才”Eg:He stayed in the room until his mother came back .We didn’t begin the meeting until the boss came.5. 由as soon as 引导的时间状语从句,“一…就”Eg:I took out the notebook as soon as the class began.四.时间状语从句要注意的几个地方(1)例如:It was raining hard(rain hard 下大雨)when got to school yesterday.While he was doing his homework, the telephone rang.As he walked along(沿着走)the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。

人教版英语八年级上册Unit6 Grammar focus教案

人教版英语八年级上册Unit6 Grammar focus教案

Unit 6 I’m going to study computer scienceSectionA Grammar Focus-3c教案设计一、教学目标1、be going to 构成的一般将来时态的用法。

2、对职业提问的表达方式。

3、时间状语从句中的一般将来时态的特别用法。

二、教学重难点重点:1、be going to 构成的一般将来时态的用法。

2、条件状语从句和时间状语从句中的一般现在时态的特殊用法。

3、掌握动词send的用法。

难点:1、用英语进行口语交际的能力。

2、口语表达带有个性观点的句型。

三、教学设计Step1 Lead-in1.向学生展示名人的成功经历,让学生自由讨论各种职业的特征。

2.学生就自己未来的梦想职业和工作进行对话交流。

3.用幻灯展示各种职业的图片和英语词汇。

Step2 Presentation1.在幻灯片上展示P43 Grammar Focus的句子,和学生一起练习一般将来时态在句子中的正确运用。

2.重点讲解一般将来时态的用法,认真学习want to be 与be going to 之间的联系。

3.任务:语言运用,完成教材P43 Activity 3a的练习。

Step 3 Drill任务:补全对话Complete the Conversations,在幻灯片上展示对话,学生完成练习。

Step4 Practice1.让学生分成小组进行对话交流练习。

2.补全对话。

Step5 Summary本节课主要学习了一般将来时态在特殊疑问句、一般疑问句和陈述句中的不同用法,与want to do 结构联系在一起学习。

Step 6 Homework1.对自己未来的理想职业工作方向,写一片英语短文。

2.补全句子。

(1)你能给你父母寄一封信吗?Could you please send a letter ____your parents?send sb. sth =send sth. to sb.给某人寄某物(2)她的愿望是当一名厨师。

[人教版][八年级下英语专题][第4讲 状语从句]讲义

[人教版][八年级下英语专题][第4讲 状语从句]讲义

1、基本内容;状语从句是复合句中三大从句之一,按照初中英语教学大纲的要求是中招必考的三大从之一。

主要考查状语从句的引导词(连词)以及状语从句的时态。

2、题型分布:状语从句主要在单项选择,完型填空和词语运用中直接考察,但在阅读、写作中都会涉及。

3、分值数据:在中招考试中直接考查本知识点所占分值大约为3-6分。

状语从句在初中年级学习分布如下:状语从句组要集中在初二,也即八年级上下学期学习,在历年期中期末以及中招考试中,主要考察状语从句的连词和时态判定,也是中考必考考点。

Clap your hands 拍手歌播放歌曲,歌词如下:Ifyou are happy and you know it, Clap your hands.第4讲 状语从句If you are happy and you know it, Stamp your feet.If you are happy and you know it, Wink your eyes.Never be afraid to show it看着歌词,让学生跟唱。

学生在欢快的歌曲中,不知不觉地认识了状语从句。

状语从句总共有9种when和while条件主将从现when 从过so...that...和连词辨析状语从句之时态such...that... while 从过进because , since since从过,从现完as之分类时间条件原因结果目的让步地点比较方式状语从句的分类【即学即练】1. Jenny didn't go to bed ________ her mother came home last night. (2016南充)A. as soon asB. ifC. whileD. until2. Wu Yi will help with the housework ________ he gets home after school.(2016湖北黄冈中学)A. sinceB. whileC. as soon asD. so3. Her grandfather lives a simple life ________ he has much money(2016广西贵港中学).A. becauseB.soC. thoughD. if4. The movie is ________ wonderful ________ I want to see it again. (2016山西孝义月考)A. too, toB.so; thatC. as, asD. so, as5. It's a good habit to wash your hands ________ you have meals.(2016孝感)A. unlessB. whileC. whenD. before6.I usually sleep with the window open ________ it's really cold. (2016淮安)A. ifB. becauseC. soD. unless【解析】1. D, 句意,Jenny没睡觉______她妈妈昨天晚上回来。

七升八英语衔接暑期新八年级英语新初二英语第7讲 状语从句讲义(含练习答案)

七升八英语衔接暑期新八年级英语新初二英语第7讲 状语从句讲义(含练习答案)

Key: When you are hardworking enough,you will be lucky.Key: If I am as fat as a pig, will I be happier?此环节教案预期时间60分钟。

1.此部分是含有状语从句的句子。

建议采取有限选择的方式,让学生选择句子,用简单的英语来解释句子所表达含义;2.重点语法讲解透测,多通过互动方式进行操练,以理解为主;3.语法在讲解的过程中注意复习,让学生能够明白状语与状语从句的区分,以及几种重要的状语从句容易错的知识点。

时间状语和时间状语从句【知识梳理1】重点连词时态用法典型例句if, as soon as, till, until 主将从现;主祈从现;主情从现We will go outing if it is fine tomorrow.As soon as I finish the job, I’ll give you a call.Please let me know if he comes back.If you feel hungry, you should eat something.when; while 主将从现主句:过去进行时;从句:一般过去时When Susan goes to town, she will visit hergrandparents.They were watching TV when the earthquaketook place.While I was watching TV, the bell rang.since 主句:现在完成时;从句:一般过去时It is+一段时间+since+从句(一过)I have been here for 5 fives.=It is 5 years since I came here.=It has been 5 fives since I came here.【例题精讲1】用适当的连词填空1. We have lived in this city __________ I moved here in 1990.2. Have you decided what you want to be __________ you grow up?3. Don't worry, I'll phone you __________ __________ __________ I get the news.4. The drunk man didn't leave the station __________ the police came yesterday.5. I haven't heard from him __________ he went to America.Keys: 1. since 2. when 3. as soon as 4. until 5. since【巩固练习1】Choose the best answer.1. They didn't start the work ____ their teacher came back.A. untilB. whileC. as soon asD. if2. The dictionary cost me too much, ____ it's really useful.A. andB. soC. butD. or3. ——Carl, are you interested in swimming?——Yes, ____ I'm not good at it at all.A. soB. andC. orD. but4. You'll be late ____ you don't get up early tomorrow morning.A. ifB. whenC. beforeD. until5. I'd like to change this pair of trousers, ____ give me my money back.A. soB. orC. butD. and6. Alice wanted to know ____ her grandmother liked the bag.A. thatB. ifC. whichD. what7. Mr. John has worked in that small town ____ he left Canada in 2008.A. whenB. afterC. forD. since8. That was our first lesson, ____ she didn't know all our names.A. forB. butC. soD. or9. ____ Saturday ____ Sunday is OK. I'll be free in these two days.A. Either orB. Neither norC. Both, andD. One, the other10. Please come ____ have dinner with us.A. orB. butC. andD. soKeys: 1. A 2. B 3. D 4. A 5. A 6. B 7. D 8. C 9. A 10. C原因状语和原因状语从句【知识梳理2】because, as, since, for, now that(既然)because>since >as>for✧Since he was not at home, I spoke to his brother.✧As these jobs are voluntary, there is no pay for them.✧The world is faced with many problems because population is growing so fast.✧Now that we have decorated the house, we can move in.✧The days are short, for it is now December.【例题精讲2】例1.Linda often has a poor memory____ she receives most of her knowledge in a passive way.A. thoughB. soC. becauseD. so that例2.Maggie bought two dictionaries ________ she could learn English by herself.A.so thatB. in order toC. because ofD. now that例3.Readers won’t be interested in a comic strip ________ it has lots of action.A. ifB. whenC. unlessD. becauseBAC【巩固练习2】Sentence Rewriting1. As I had a cold, I was absent from school. (对划线部分提问)you absent from school?2. I didn’t go out for a walk because it was wet.(对划线部分提问).you go out for a walk?3. Li Ping has a bad cold. He has to stay in bed and drink much hot water.(合并为一句)Li Ping has to stay in bed and drink much hot water he has a bad cold.4. John didn’t attend the meeting because of his illness.(保持原句意思)J ohn didn’t attend the meeting because he .5. Since everybody is here, let’s begin the meeting.(保持原句意思)everybody is here, let’s begin the meeting.6. No planes could land at the airport because there was the typhoon.(保持原句意思)No planes could land at the airport the typhoon.7. The fish will go bad, so you’d better put it in the fridge. (保持原句意思)You’d better put the fish in the fridge, it will go bad.8. She missed the early bus, so she didn’t come to school on time.(保持原句意思)She didn’t come to school on time she the early bus.Keys: 1. Why, were 2. Why didn’t 3. because 4. was ill 5. Now that 6. because of 7. Or 8. because, didn’t catch条件状语和条件状语从句【知识梳理3】主将从现(主祈从现、主情从现)We won’t take action unless everyone agrees.You will fail in French unless you harder.If you feel hungry ,you should eat something.Please let me know if he comes back.祈使句→if 状从提高题II. Choose the best answer.1. A good storyteller must be able to hold his listeners' curiosity ______ he reached the end of the story.A. whenB. unlessC. afterD. until2. He transplanted the little tree to the garden _______ it was the best time for it.A. whereB. whenC. thatD. until3. He was about to tell me the secret ________ someone patted him on the shoulder.A. asB. untilC. whileD. when4. _______ you understand this rule, you'll have no further difficulty.A. WhileB. OnceC. ThoughD. Unless5. Substances will expand or contract _______ heated or cooled, but this is not the case with water.A. when they will beB. if they will beC. as they beingD. when6. It will not be long ________ man can harness the solar energy and make it serve mankind.A. sinceB. beforeC. whenD. after7. It was found that although the girl could perceive things with her fingers, this ability ceased her handswere wet.A. the moment whenB. the momentC. in that momentD. before8. A man escaped from the prison last night. It was a long time _______ the guards discovered what had happened.A. beforeB. untilC. sinceD. when9. We hadn't met for 20 years, but I recognized her ________ I saw her.A. the momentB. the moment whenC. for the momentD. at the moment when10. _______ he entered the university, his English has been much improved.A. BeforeB. AfterC. WhenD. Since11.He has been to Beijing for several times _______ he came to China.A. beforeB. whenC. sinceD. as12.I watched him ________ he disappeared from sight in the distance.A. unlessB. untilC. asD. when13.It was going to be some time _______ he would see his parent again.A. sinceB. untilC. whenD. before14.Many young people rose and shouted the pop singer appeared on the stage.A. at the momentB. on seeingC. the momentD. when they saw15. he made up his mind to do something, nothing can change his mind.A. OnceB. UnlessC. AlthoughD. As soon as16.They had only been married for no more than three months they began to quarrel with each other.A. sinceB. untilC. afterD. before17.Scarcely had I finished the work I went home.A. beforeB. thanC. asD. when18.We were walking down the street he saw one of his old friends.A. thenB. whenC. soD. but19.It ________ he returns to his native land.A. is long before thatB. is long beforeC. won't be long beforeD. will be long since20. _________ the Europeans knew what a compass was, the Chinese had put it into practical use.A. Before longB. Long sinceC. Long agoD. Long before21. _________ on a clear day far from the city crowds, the mountains give him a sense of infinite peace.A. WalkingB. When one is walkingC. If walkingD. When walking22. I thought him a pleasant person to work with I met him.A. the first timeB. for the first timeC. first timeD. by the first time23. He has been in hospital he had his right leg broken last month.A. becauseB. whenC. afterD. since24. _________ he decided to go there alone, none of us can stop him.A. OnceB. UnlessC. BeforeD. Since25. Doing your homework is a sure way to improve your test scores, and this is especially true it comes to theclassroom tests.A. beforeB. asC. sinceD. WhenIII. Reading comprehension (阅读理解)A. Choose the best answer(根据短文内容,选择最恰当的答案)Almost nothing we do in this world is done in isolation(孤立). At work or at play, you will find yourself in groups, working with other people: your team at work, a meeting with fellow workers, your family, a holiday with friends, a group of students working together, a group of neighbors wanting to make changes. It is now realized that being able to work successfully with other people is one of the main keys to success, partly because we need to do it so often.In almost every situation where you’re in a group, you will need a skilled leader. All groups need leaders and all successful groups have good leaders. Groups without leaders or with weak leaders almost always break down. Members of a leaderless group often begin to feel disappointed and helpless. Time is wasted and the tasks are not achieved. There are often arguments and nervousness between people as there is nobody to keep the goals clear. Often group members begin not to come to meetings in order to avoid(避免) more disagreement.Some people are natural leaders. The well-known cook, Antonio Carlucci says, “True leaders are born and you can see them in kitchens.”They’re people who are strong, fair and humorous. Although a lot of people agree that there are some natural-born leaders, most people now know that leadership can also be taught. Experienced teachers can train almost anyone how to be a successful leader. Good leaders don’t make people do things in a controlling way. You can learn how to join others, encouraging the whole group to work towards a common goal.Successful leaders also need to be calm and wise. They need to be able to work out good solutions and make perfect judgments under pressure. Lastly, and probably most importantly, good leaders need to be sensitive, confident and be able to get on with a variety of people.1. When we are at work or at play, we find we are probably at working ._______.A) independently B) successfully C) in isolation D) in groups2. Groups with ______leaders will often cause arguments at meetings or between people.A) good and strong B) no or weakC) skilled and weak D) good and natural3. People who are born strong and humorous are called _______.A) natural leaders B) well-known cooksC) experienced staff D) successful leaders4. Good leaders always have many ways of doing things except_______.A) joining people together B) encouraging the whole groupC) controlling people to do things D) leading people to work towards goals5. Which of the following is NOT correct according to this passage?A) One of the main keys to success is being able to work with others well.B) People will often feel disappointed and helpless if they aren’t with good leaders.C) Being calm and wise can help leaders make perfect judgments under pressure.D) Experienced teachers can hardly train people to be successful leaders.6. Which of the following can be the best title for this passage?A) How to be successful leaders B) Successful leadersC) Why to be natural leaders D) be sensitive and confidentB. Answer the questions(根据短文内容回答下列问题)Isabel Allende’s novels are enjoyed all over the world. She is famous for her creativity and imagination. And her own personal story is as amazing as any she has ever told in a novel. Born in 1942, Allende’s family moved often during her childhood. She went to school in South America, Europe, and Asia. As a young woman, she became a journalist in Santiago, Chile’s(智利)capital city. Then, she got married and had two children. In 1970, everything began to change.Leaving homeIsabel Allende’s uncle was a political leader named Salvador Allende. In 1970, her uncle was elected president of Chile. In 1973, Augusto Pinochet led a military takeover(军事接管)of the Chilean government. President Allende was killed during the fighting. When Isabel Allende began to fear for her life, she and her family decided to move to Venezuela(委内瑞拉).From Newspaper to NovelsIt was really a painful experience for Isabel Allendo to flee her country. Without this experience, however, Allende says she never would have begun writing novels. Then she got a phone call from Chile. Her grandfather was dying. She knew she could not return home to be with him, but she wanted to respect him in someway.“I decided to write a letter about all the things he told us when we were young,” Allende explains. Later, he wrote a long letter which became Allende’s first novel, The House of the Spirits.The Writing Life“I spent ten, twelve hours a day in a room, writing,”Allen says, “I don’t talk to anybody; I don’t answer the phone.”When she finishes the first draft(草稿)of a new novel, Allende mails a copy to her toughest critic(最严厉的评论家).“I send it to my mother in Chile. She reads it and come here with a red pencil. We fight for a month at least.”Allende then goes back to work until she feels the book is finished.“The storytelling is the fun part,”she says.“The writing can be a lot of work!”1.Isabel Allende’s own personal story is very amazing, isn’t it?2.What was Isabel Allende before she got married?3.How did the military takeover influence(影响)Isabel Allende’s life?4.Why did Isabel Allende start writing her first novel?5.How do you understand“We fight for a month at least”in the last paragraph?6.What kind of person do you think Isabel Allende is? Give your reason(s).Keys:1-5 DBDBD 6-10 BBAAD 11-15 CBDCA 16-20 DDBCD 21-25 BADADDBACDBYes, it isShe was a journalist.She began to fear for her life.To respect her grandfather in some way.She and her mother talked about the novel for at least a month before it was done.She has strong will and never give up.(Any answer reasonable is OK)教学建议:1. 包含预习下次课单词与短语和复习本次课内容两部分;This gave him the idea of mixing clay with nitroglycerin. The clay would take the oil out of nitroglycerin and make it safer. He called his new explosive ’dynamite’.Dynamite was very useful. Alfred Noble made and sold so much of it that he became avery rich man. In his will he gave a lot of money to the Swedish Academic of Arts andScience(瑞典艺术和科学学院).He wanted the money to be used it give prizes to peoplewho did excellent work. The Academic called them ‘Noble Prize’. The winners get a lot ofmoney.Noble wanted one of the prizes to be given to people who work foe peace because hehated war and he did not want people to remember him as ‘the dynamite man’. Some very famous people have won the Noble Peace Prize. including Nelson Mandela of South Africa. The United Nations Peacekeeping Forces won the prize in 1988.Noble Prize are given out on December---the date that Noble died.1.Alfred Noble began studying nitroglycerin after he_________.A) first made dynamite B) made a lot of moneyC) had a bad accident in his laboratory D) gave all his money to the Academy2.Nitroglycerin is a very dangerous kind of______________.A) dynamite B) oil C) clay D) explosive3.The government would not let Alfred Noble make explosive in his laboratory because_________A)they wanted him to go to the lake B) Sweden is a very peaceful countryC) it was too dangerous D) Noble’s brother had alre ady made some4.The word “This”in Paragraph3refers to”_____________”.A) Nitroglycerin was coming out. B) The large clay box was still dry.C) The clay was mixed with nitroglycerin. D) never gave any money away.5.Alfred Noble became very rich because he____________A)won a lot of prizes B)made and sold a lot of dynamiteC) knew how to make nitroglycerin. D) The small boxes were put into a large box.6. The story is mainly about______________.A)the man who first made dynamite B) people who have won the Noble Prize.C) laboratory accidents D) the Swedish AcademyB. Choose the best answer.(1)My grandfather is and last month my grandmother celebrated her 70th birthday. I first noticed that they were having trouble remembering things when I went to their flat for dinner. My grandmother forgot a fish was in the oven and it. Everyone forgot things sometimes, so I did not think much about it.Another time we arranged to go out for dinner together. My mother told my grandfather to meet us at the station. My grandparents were not there when we arrived. My mother phoned them and my grandfather said they were at home waiting for us. They knew we were having dinner together but they forgot about the meeting place.It turned out that they -forgetting simple things. I then started thinking about how to help my grandparents improve their memory. Even though my memory is good, I make a list of things I need to bring to school the next day before I go to bed. It’s good to prevent me from forgetting anything. I told my grandparents to write more things down and share information with each other. By doing these things, myC. Read the passage and fill in the blanks with proper words. (在短文的空格内填入适当的单词,使其内容通顺,每空格限填一词,首字母已给)(1)Today, it is a big problem for young graduates to get good jobs. It is said that there are thousands of different kinds of jobs in the world. Choosing the right one is not that easy.“Finding a job” is not the same as “choosing a job”. Many young people end up in a job, but they are not suitable for it. Sometimes a “c______” may play a more important part than a “decision”.Here are a few steps to help you think about jobs which you might enjoy after school or university. First it is important to r______ what kind of person you are, which special qualities make you outstanding and w_______ you are interested in. There is a different between an interest and a skill. If you like art and enjoy looking at pictures, that is an interest. But if you can draw a horse that looks like a horse not a big dog, that is a skill. Then ask y_____ a question,” In the f______ areas---skills with people, skills with information and skills with things, which are your best skills?” A______ examining your skills, the next step is research. To find about as many different kinds of jobs as p______ , go to the library and read books, magazine and newspapers for information. Ask your friends what they think of the work they do. Finally, trust your own ideas and your own thinking! It is your own life, just find the job you really enjoy doing.(2)As a child, I learnt how to make paper masks from newspapers and old magazines. Later I used coloured cardboard. Making masks seemed like a popular art activity. After we made the masks, my classmates and I would put them on and pretend to be people that we were not. By hiding our faces b_________ the masks, it did not seem ridiculous to pretend to be an old man or a baby. Immediately, the mask helped us to step into the shoes of a____________ character.A mask allows a person to take on different characters, to pretend and make-believe. Have you ever w_________ what the actual face of the clown at the circus is like? The clown’s mask, with white smiling mouth and the round red cheeks, covers whatever the clown r________ looks like.Masks can also be used to hide what we do not want people to see. For example, the Phantom of the Pera, tells the story of a man who fell in l_______ with a beautiful woman. However, one side of his face was ugly and terrible to show anyone. Thus, he wore a mask to hide that part of his face.Adults, more than children wear different masks every day. These are not actual masks like the types that are made in art classes in schools. These masks refer to the person’s ability to hide his real thoughts and feelings. He will behave in different ways no matter what he is actually feeling i_________. Sometimes, we will put on a happy face even though we are s_______. We wear masks because we do not want people whom wedo not know well to know what we are actually thinking and feeling.D. Read and answer the questions.An old carpenter was ready to retire. He told his employer (雇主) of his plans toleave the house building business and live a more relaxing life with his wife andchildren. He would miss the paycheck, but he needed to retire. They thought they couldsupport themselves for the rest of their life.The employer was sorry to see his good worker go and asked if he could build just one more house. The carpenter said yes, but in time it was easy to see that his heart was not in his work. He turned to bad workmanship and used poor building materials.It was an unlucky way to end his working life. When the carpenter finished his work and the employer came to see the house, he handed the front door key to the carpenter. "This is your house," he said, "my gift to you."What a shock! What a shame! If he had only known he was building his own house, he would have done it all so differently. Now he had to live in the home he had built none too well.So it is with us. We build our lives in a distracted (不专注的) way, willing to put up less than the best. At important points we do not give the job our best effort. Then with a shock we look at the situation we have created and find that we are now living in the house we have built. If we had realized that, we would have done it differently.It is the only life you will ever build. Even if you live it for only one day more, that day deserves to be lived with dignity (尊严).The sentence on the wall reads, "Life is a do-it-yourself project." Who could say it more clearly? Your life today is the result of your attitudes and choices in the past. Your life tomorrow will be the result of your attitudes and choices you make today.1. The old carpenter lived quite a rich life with his wife and children, didn't he?2. Why did the old carpenter want to retire?3.What did the old carpenter's employer ask him to do before he retired?4.How did the carpenter do the job his employer asked him to do?5.How did the carpenter feel when he realized that the last house he built was his home?6. What does the sentence on the wall mean?KEYS:II. CDADD CBCDA BDCCA BABCDIII. CDCBBA DAABCD BABCADchoice; realize; what; yourself; following; after; possible;Behind;another;wondered;really;love;inside;sadYes, he did.Because they thought they could support themselves for the rest of their life.He did bad workmanship and used poor building materials.What a shock! What a shame!Your life today is the result of your attitudes and choices in the past. Your life tomorrow will be the result of yourattitudes and choices you make today.今天天气很好,阳光四溢。

八年级英语语法专讲状语从句

八年级英语语法专讲状语从句

八年级英语语法专讲——状语从句状语从句用来修饰主句中的动词,副词和形容词的从句叫状语从句。

根据其含义状语从句可分为时间状语从句,地点状语从句,条件状语从句,语从句,地点状语从句,条件状语从句, 原因状语从句,结果状语从句,比较状语从句,目的状语从句,让步状语从句。

时态遵从主过从也过,主将从现在1. 时间状语从句(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as 等连词来引导。

例如:等连词来引导。

例如:While he was doing his homework, the telephone rang. 2. 条件状语从句(1)条件状语从句通常由if, unless 引导。

例如:引导。

例如: What shall we do if it snows tomorrow? Don’t leave the building unless I tell you to.3. 原因状语从句(1)原因状语从句通常由because, since, as 引导。

例如:引导。

例如:He didn’t come to school because he was ill.(2)because 表示直接原因,语气最强。

Because 引导的原因状语从句多放在主句之后。

回答由why 提出的问题,只能用because 。

As 和since 语气较弱,一般用来表示明显的原因。

由as 和since 引导的原因状语从居多放在句首。

例如:多放在句首。

例如:------------Why aren’t going there?Why aren’t going there? ------------Because I don’t want to.Because I don’t want to.As he has no car, he can’t get there easily.(3)because 和so 不能同用在一个句子里。

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2013年8 年级下教案第几讲: 9教学课题:Module 8 Public holidays教学目标:1..课文中重点单词、词组、句子的理解与掌握2.课文与单词的朗读与翻译要求掌握3语法:时间状语从句教学重点:课文与单词的朗读与翻译要求掌握教学难点:语法:时间状语从句教学过程:一.Greetings二.Dictation1Words 2 phrases 3 sentences:三.语法——时间状语从句定义:英语中可以用句子表达一件事情或一个行为发生的时间,这个句子就叫时间状语从句。

时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。

1.由when引导的时间状语从句When意为“当…的时候”,when引导的从句的谓语动词可以是延续性的动词,又可以是瞬间动词。

Eg:When the teacher came in, the students stopped talking.He knocked at the door , when my mother was sleeping.2.由while引导的时间状语从句“与…同时,在…期间”,谓语动词必须是延续性动词。

EG:Lucy was cleaning the room while Lily was listening to music.3. 由before/after 引导的时间状语从句,before“在…之前”,after“在…之后”Eg:He went to the office before he visited Mr. Zhong.I called Betty after I finished the homework.4. 由until引导的时间状语从句,“直到…为止”,not until “直到…才”Eg:He stayed in the room until his mother came back .We didn’t begin the meeting until the boss came.5. 由as soon as 引导的时间状语从句,“一…就”Eg:I took out the notebook as soon as the class began.四.时间状语从句要注意的几个地方(1)例如:It was raining hard(rain hard 下大雨)when got to school yesterday.While he was doing his homework, the telephone rang.As he walked along(沿着走)the lake, he sang happily.He had learned a little Chinese before he came to China.After he finished middle school, he went to work in a factory.(2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。

例如:I’ll ring you up as soon as I get to New York.I will tell him everything when he comes back.He won’t believe it until he sees it with his own eyes.(3)在带有till或until引导的时间状语从句的主从复合句里,如果主句用肯定式,其含义是“一直到……时”,谓语动词只能用延续性动词。

如果主句用否定式,其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。

例如:The young man read till the light went out(熄灭).Let’s wait until the rain stops.We won’t start until Bo b comes.Don’t get off(从下来)until the bus stops.【Till是指直到某一特定事件发生的时候,而在那个时刻之后,该事情或状况仍将持续。

Until是指直到某一特定事件发生的时候,而讲话的人在自己心里认为,在那个时刻之后,该事情或该状况将中止(不怎么可能持续)。

固定组合里from morning till night,till/until是不能替换的,】五.when, while 和as 引导时间状语从句的用法区别这三个词的意思很简单,都有“当……时候”的意思。

一、when 的用法如果只从现象来看,when 从句用的最多的是一般过去时,而主句的时态没有限制,根据具体情况而定。

1. When he was a child he was always trying out new ideas.2. When she came into my room, I was just reading a book. 她走进我房间时,我正在看书。

3. Were you writing when the teacher came in? 老师进来的时候,你在写信吗?4. Sorry, I was out when you called me. 对不起,你打电话来的时候我出去了。

5. He was on the point of leaving when someone knocked at the door. 他正要走,这时有人敲门。

6. I thought of it just when you opened your mouth. 就在你要说话的时候,我也想到了。

7. I had hardly[scarcely] closed my eyes when someone knocked at the door.根据以上的例句,我们可以总结出一点:when 从句的A事件,相当于另一个事件B 发生的时间点。

也就是说,when 从句的重点不在动作本身发生的状态,而只是把它作为一个时间点,所以when 多数情况下用的是一般过去时,则不用正在进行时。

因为如果用正在进行时,它表示的就是一段时间而不是一个时间点了。

根据这一点,有的文章补充说:when 从句的动词大多是瞬时动词。

这种说法也可以参照。

实际上,when 从句也可以有其它的时态,但几乎也不用进行时,因为它也只是作为一个时间参照点。

例如:1. When I got to the airport, the guests had left. 2. When he had finished his homework, he took a short rest.3. Why do you want a new job when you have got such a good one already?4. You shall borrow the book when I have finished reading it.5. When the manager comes here for a visit next week, I’ll talk with him about this.二、while 的用法相比于when 来说,while 从句的侧重点就不一样了。

while 从句的侧重点在于描述动作正在发生的状态,它的意思是:当while 事件正在发生的时候,另一件事如何如何。

所以,while 从句一般用的是正在进行时。

而另一件事的状态没有硬性的要求,根据具体情况而定。

例如:1. While my wife was reading the newspaper, I was watching TV.当妻子正在看报纸的时候,我正在看电视。

2. While Jim was mending his bike, Lin Tao came to see him.正当吉姆修自行车时,林涛来看他。

3. While they were talking, the bell rang. 正在他们谈话的时候,上课铃响了。

4. You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。

5. While John was sitting biting his nails, I was working out a plan to get us home.约翰坐在那里咬指甲时,我正在制定一个回家的计划。

从时间的角度来看,while 表示的是一段时间,是一个过程。

这是while 的侧重点。

因此,如果含有“一段时间”的含义的时候,就可以用while。

6. Strike while the iron is hot. 趁热打铁。

这句话中,是说趁着铁是热的这段时间,赶紧打铁。

如果换成when 意思就变了,相当于说铁只热了一下,打一下,然后铁就冷了。

这显然不符合文意。

再例:—I'm going to the post office.—While you're there, can you get me some stamps?三、as 的用法as 从句表示的也是一件事情正在发生,另一件事也正在进行当中。

但与while 从句不同的是,as 从句用的一般不用正在进行时,而只是一般过去时。

as 从句一般可以翻译成“边……边……”。

例如:1. As my mother sang those old songs, tears ran down her cheeks.当我妈妈唱起那些老歌时,眼泪顺着她的脸颊流了下来。

2. The students took notes as they listened. 学生们边听课边做笔记。

3. As we talked on, he got more and more excited. 我们继续往下谈的时候,他越来越兴奋。

4. The little girls sang as they went. 小姑娘们一边走,一边唱。

5. Just as he caught the ball, there was a tearing sound. 当他抓住球的时候,有一种撕裂的声音。

as 表达的事件,往往只是主句动作发生的背景或条件时,as 只是一个次要的时间说明,不像while 从句有强调while 动作本身的意思。

因此,as 常常翻译成“随着……”之意。

例如:1. As the time went on,the weather got worse. 随着时间的推移,气候更加糟糕。

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