初中英语状语从句复习讲义简明版
状语从句(43张PPT)初中英语专项复习课件
知识点 2 状语从句的连接词
(3) 强调句型：It is/was not until ... that ...
It was not until the professor came that we began the experiment. 直到教授来了，我们才开始做实验。 易错点：（1）till不可以置于句稿首定，PP而T until可以。 Until you told me I had no idea o稿新f定，itP上.P千T，款海模量板素选材择持总续有更一 直到你告诉我，我才知道这件事款适。合你
It’s three years since he joined the army.(自从......多久了......)
自从他参军已经三年了。
稿定PPT
稿定PPT，海量素材持续更
It's two years since we arrived新h，e上re千. 款我模们板选到择这总有儿一两年了。 款适合你
连词
常用句式
before It will be＋一段时间＋before ... 过……时间才……
since
It will not be/was not long＋before ... 不久就会/没多久就…… It was＋时间段＋befo稿稿r定e定P.P.P.TP，过T海了量素…材…持续(时更 间)才…… It is/has been＋一段时新间，上＋千s款in模c板e选..择. 总(从有一句用一般过去时)
as soon as / no sooner … than / hardly … when / the moment / the minute /（一…就…) since （自从…以来）
知识点2：状语从句的连接词 No. 1 时间状语从句 1．when, while, as 引导的时间状语从句
(完整版)初中英语语法专题(状语从句)讲解
初中英语语法专题（状语从句）讲解状语从句在复合句中作状语，修饰动词、形容词或副词等。
状语从句可以表示时间、条件、原因、地点、目的、结果、让步、方式、比较等意义。
知识梳理：提纲挈领，抓住重点和难点！各类状语从句连接词（短语）一览表：时间 when, while, as, as soon as, since, until, after, before条件 If, unless原因 As, because, since地点 Where目的 So that, in order that结果So that, so…that, such…that让步 though, although, even if, however方式 As比较 t han, (not)as…as,时间状语从句：Whenever he comes, he brings a friend. 他每次来都带个朋友。
条件状语从句：As long as I am alive, I will go on studying. 只要我活着，我就要学习。
原因状语从句：Since we live near the sea, we enjoy nice weather.由于我们住在海边，能享受到好的天气。
地点状语从句：Put it where we can all see it.把它放在我们都能看到的位置。
目的状语从句：Finish this so that you can start another.把这个做完，你可以开始另一个。
结果状语从句：He was so angry that he couldn't say a word. 他气得说不出话了。
让步状语从句：Though he is in poor health, he works hard.虽然他身体不好，但是他工作很努力。
方式状语从句：Students do as the teachers say.学生们按照老师说的去做。
状语从句讲义(讲稿)
状语从句状语从句在高考试题中由于其他从句的干扰，以及倒装句，强调句的介入，使得状语从句更为复杂。
状语从句是一种副词性从句，通常由一个从属连词或一个起连词作用的词组引导。
状语从句1. 时间状语从句常见的连词(组)：when, while, as, before, after, once, till, until, as soon as, now that, hardly ...when, scarcely ...when, no sooner ...than等。
可以引导时间状语从句的副（介）词（短语）或名词短语：directly, instantly, immediately, by the time, the moment, the second, the minute, the instant, every time, each time, next time, the last time等。
注意点如下：(1) when, while, as引导的时间状语从句as表示“当……的时候”，往往和when/ while通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生。
when(at or during the time)既可以表示在某一点的时候，又可以表示在某一段时间内，主句与从句的动作或事情可以同时发生也可以先后发生。
while强调一段时间，仅表示从句和主句的动作同时发生，并且有延续意义，该从句中的动词一般要用延续性动词，从句中常用过去进行时态或一般过去时态；当when表示a period of time时，两者可以互换。
She came up as I was cooking.(同时) 在我做饭时，她走了过来。
When we were at school, we went to the library every day.(在一段时间内) 当我们在学校时，每天都去图书馆。
While they were watching TV, I was preparing myself for the coming examination.他们在看电视，而我在为即将到来的考试做准备。
中考英语语法复习说课稿讲义第十三讲：状语从句
中考英语语法复习说课稿讲义第十三讲：状语从句一. 教材分析状语从句是中考英语的重要语法点之一，它是句子的一种从属结构，用来修饰动词、形容词、副词或整个句子。
状语从句分为时间状语从句、地点状语从句、原因状语从句、条件状语从句、目的状语从句等。
本讲义将详细讲解这些状语从句的用法和构成。
二. 学情分析学生在学习状语从句时，可能会遇到以下问题：1.对状语从句的概念理解不清晰，容易与其他从句混淆。
2.对状语从句的连接词掌握不牢固，导致句子结构不正确。
3.对状语从句的运用不够灵活，不能准确表达句子的意义。
三. 说教学目标1.让学生掌握状语从句的定义和分类。
2.让学生掌握状语从句的连接词及其用法。
3.让学生能够正确运用状语从句表达句子的意义。
4.提高学生的英语句子表达能力。
四. 说教学重难点1.状语从句的分类和用法。
2.状语从句连接词的掌握。
3.状语从句在实际语境中的运用。
五. 说教学方法与手段1.采用讲授法，讲解状语从句的定义、分类和用法。
2.采用举例法，通过具体例句讲解状语从句的连接词及其用法。
3.采用练习法，让学生通过练习巩固所学知识。
4.采用小组讨论法，让学生在小组内讨论状语从句的运用。
六. 说教学过程1.导入：通过一个谜语引出状语从句的概念，激发学生的学习兴趣。
2.讲解：讲解状语从句的定义、分类和用法，以及状语从句的连接词。
3.举例：通过具体例句展示状语从句的用法，让学生理解和掌握。
4.练习：让学生进行状语从句的练习，巩固所学知识。
5.小组讨论：让学生在小组内讨论状语从句的运用，分享学习心得。
6.总结：对本讲内容进行总结，强调重点知识点。
7.布置作业：布置有关状语从句的练习题，让学生课后巩固。
七. 说板书设计板书设计如下：1.状语从句定义2.状语从句分类–时间状语从句–地点状语从句–原因状语从句–条件状语从句–目的状语从句3.状语从句连接词–because–since–although–until–so that–in order that八. 说教学评价通过课堂讲解、练习和小组讨论，评价学生对状语从句的理解和运用程度。
状语从句知识点详解(初中英语专项复习)14
状语从句知识点详解（初中英语专项复习）状语从句的概念: 用一个句子作状语来修饰动词和形容词，以表明动作发生或状态存在的时间、地点、原因等，这个句子就叫做状语从句。
状语从句的分类：状语从句共分为九大类，包括：时间、地点、原因、条件、让步、目的、结果、方式、比较状语从句。
下面分别讲解：一、时间状语从句概念：用来表示时间的状语从句，由when, while, as, till, until，before, after, since等引导。
由于时间状语从句的引导词所表示的意思并非一致，不同引导词表达不同的时间，它们在句子中对应的时态、语态等也有所不同。
例如：when /while引导的时间状语从句when引导的从句的谓语动词通常是瞬间动词，也可以是延续性动词。
从句动作可与主语动作通常先后发生也可同时发生。
I was writing when my sister came back.( come是瞬间动词，只能用when引导，不能用while)He often wrote me when/while he studied in Shanghai International Studies University.( study 是延续性动词，while可代替when)While my mother was cooking , I was playing chess with dad. (cook是延续性的动词，cook和play同时发生)I like playing chess while my sister likes reading stories.我喜欢下棋，而我姐姐喜欢看小说。
(while表示对比)when和while的区别还有：while引导的时间状语从句多用于进行时态，而when引导的时间状语从句多用于一般时态。
While we were playing games, our headmaster called me .我们正在做游戏的时候，校长叫我了。
中考英语语法学习之状语从句讲义
中考英语语法学习之状语从句一、什么是状语从句?状语从句是指一个句子中，作为状语的从句。
状语从句通常由引导词引导，如连词if、whether、how、when、why 等。
状语从句的作用是修饰主句，起到说明、限制或补充等作用。
二、状语从句的分类1.时间状语从句时间状语从句是指用来说明事件发生的时间的从句。
它通常由连词when、while、since、before、after等引导词引导，用来修饰主句中的时间。
例如:I have been to China twice. (我第一次去中国是在两年前。
)He has been studying English for five years. (他已经学习英语五年了。
)They will arrive at the airport at 7 pm. (他们将在晚上7点到达机场。
)We had a meeting at 2 pm this afternoon. (今天下午我们开了一个会议。
)需要注意的是，时间状语从句通常放在主句之前或之后，但在某些情况下可能会放在主句中间。
2.地点状语从句地点状语从句是指用来说明事件发生的地点的从句。
它通常由连词where、why、how等引导词引导，用来修饰主句中的地点。
例如:I saw her in the library. (我在图书馆看到她。
)They are going to have a meeting in the conference room. (他们将在会议室里开会。
)He is studying in his bedroom. (他正在卧室里学习。
)We had dinner at a restaurant last night. (昨晚我们在一家餐厅吃了晚饭。
)需要注意的是，地点状语从句通常放在主句之前或之后，但在某些情况下可能会放在主句中间。
3.原因状语从句原因状语从句是指用来说明事件发生的原因的从句。
中考英语语法专项复习之状语从句讲义
初中英语语法专项复习之状语从句状语从句是英语中一个重要的语法项目，其用法主要包括以下几个方面:时间状语从句:表示时间:时间状语从句通常用来表示动作发生的时间。
例如，“Yesterday I saw a movie”中，“yesterday”表示这个动作发生的时间是昨天。
表示时间段:时间状语从句还可以表示一个时间段。
例如，“I have been studying for three hours”中，“three hours”表示我学习了三个小时的时间段。
表示先后顺序:时间状语从句还可以表示两个或多个动作发生的先后顺序。
例如，“After I ate breakfast, I went to work”中，“after I ate breakfast”表示在吃完早餐之后，我去上班。
表示时间间隔:时间状语从句还可以表示两个动作之间的时间间隔。
例如，“I will be at the concert for two hours”中，“for two hours”表示我会在音乐会上待两个小时。
表示时间变化:时间状语从句还可以表示时间的变化。
例如，“The weather changed from sunny to rainy”中，“from sunny to rainy”表示天气从晴天变为雨天。
地点状语从句:表示地点:地点状语从句通常用来表示动作发生的地点。
例如，“I am at the park”中，“at the park”表示这个动作发生的地点是公园。
表示方位:地点状语从句还可以表示方位。
例如，“He is standing on the corner”中，“on the corner”表示他站在街角。
表示时间:地点状语从句还可以表示时间。
例如，“Yesterday I saw a movie at the cinema”中，“at the cinema”表示这个动作发生的时间是在电影院里。
表示原因:地点状语从句还可以表示原因。
中考英语状语从句讲义
状语从句一：定义地点时间1.Wukong beat Bajie in a hole yesterday.Wukong beat Bajie where they stayed when it was dark.总结：状语：动作发生的时间地点状态目的条件等。
状从：状语的位置是一个句子。
二.状语从句的分类1.时间状从引导词：since、ever since、until、not until、till 、after、before when while as 、as soon as、the moment、whenever While he was watching TV, his father came back.When I was in China, I visited many places of interest.As he walked along the street, he sang happily.(动作同时发生)2．地点状语从句引导词：where（在…地方）wherever（无论哪里）Where there is a will, there is a way.Wherever you go, I will be waiting for you.练习：You should put the book (where/wherever)you found it.(where/wherever)I am, I will be thinking of you.3.让步状语从句引导词：although/though (尽管虽然)—不能与but连用even if/even though（即使）Even if it rains tomorrow, we won’t change our plan.He runs fastest even though he is the shortest.Even if / Even though she laughs at him, he likes her.练习---翻译虽然我们已尽了最大的力量，但还是输了。
2022年中考英语状语从句知识点讲解(原版)
状语从句知识点讲解定义：在句中作状语的从句叫状语从句，修饰主句中的谓语局部。
考点：状语从句有九种，其主要考点为各类连接词，理解句子即可。
一、时间状语从句(1) when/while/as1)when引导的时间状语从句意为“当・・•时候”，表示从句和主句的动作先后或者同时发生。
从句中的谓语动词可以用短暂性动词也可以用延续性动词。
例如：When the teacher came in, we were talking.When I first arrived on this country, I had nothing.2)While引导的时间状语从句意为“当…时候二表示从句和主句的动作同时发生。
从句中的谓语动词必须用延续性动词。
例如：I was sleeping while Tom was watching TV.3)as弓|导的时间状语从句意为“一边…一边”，强调主句和从句的动作同时发生。
例如：She sang as she worked.练一练：1.you came in, I was talking with a few boys.1.1t started to rain we were playing outdoors.3.They talked they walked down the river.4.it was raining, the students were playing basketball.5.Tom watched TV he ate supper.(2)before指主句的动作发生在从句的动作之前。
after指主句的动作发生在从句的动作之后。
例如：I'll be backbefore.你离开之前我就会回来。
What will you do after you graduate?你毕业之后想要干什么？(3)since引导的时间状语从句，从句的谓语动词通常为一般过去时，主句的谓语动词通常为现在完成时例如:He has been worried since the letter arrived.自从收到信,他就一直很担忧。
最简明状语从句讲解
高中英语状语从句一、定义：在句中作状语的从句是状语从句，修饰主句中的动词、形容词或副词，句子等。
状语从句由从属连词引导，从属连词在句中不充当句子成分，只起连接作用，状语从句放在句首时，要用逗号，放在句尾时不用。
二、分类根据意义上的不同，状语从句可分为：①时间状语从句②地点状语从句③原因状语从句④结果状语从句⑤条件状语从句⑥让步状语从句⑦目的状语从句⑧方式状语从句⑨比较状语从句尽管种类较多，但由于状语从句与汉语结构和用法相似，所以理解和掌握它并不难。
状语从句的关键是要掌握引导不同状语从句的常用连接词和特殊的连接词即考点。
现分别列举如下一．时间状语从句引导When he got there,the classroom had been cleaned.二．地点状语从句You are free to go wherever you like.三．原因状语从句Because he was ill，he didn’t come to school.四．结果状语从句Mike is so honest a worker that we all believe him.Mike is such an honest worker that we all believe him.．五. 条件状语从句We’ll start our project if the president agrees.六．让步状语从句He is unhappy though he has a lot of money.七．目的状语从句I'll speak slowly so that you can understand me.八.方式状语从句：Do as you are told to,or you'll be fired.The old lady treats the boy as if he were her own son.九．比较状语从句She is as bad-tempered as her mother.。
初中英语语法学习之状语从句精讲
初中英语语法学习之状语从句精讲英语状语从句是英语学习中的一个重要考点，下面将针对英语状语从句进行考点归纳。
一、时间状语从句时间状语从句是语法中的一个重要考点，下面是一些常见的时间状语从句:when:表示某个时间点或时间段，如“I will arrive at the airport when the plane takes off.”before:表示某个时间点或时间段之前，如“I will eat breakfast before I go to work.”after:表示某个时间点或时间段之后，如“I will finish my homework after I have dinner.”while:表示某个时间点或时间段持续，如“I was studying while she was sleeping.”as soon as:表示某个时间点或时间段一过去就发生，如“I will call you as soon as I get home.”until:表示某个时间点或时间段一直持续，如“I won't leave until I have finished my work.”since:表示某个时间点或时间段以来，如“I have been living in this city since I moved here last year.”when/while/as:这些词都可以引导时间状语从句，但它们的使用略有不同，需要根据具体语境选择使用哪个。
需要注意的是，如果主句是一般将来时，从句只能用一般现在时，如“I will go to the store tomorrow”中的“tomorrow”就是时间状语从句。
二、地点状语从句地点状语从句是语法中的一个重要考点，下面是一些常见的地点状语从句: where:表示某个地点，如“I will go to the store where I bought the groceries.”that:表示某个地点或位置，如“I saw a beautiful sunset over that mountain.”which:表示某个地点或位置，如“The building which is on fire needs to be evacuated immediately.”where/that/which:这些词都可以引导地点状语从句，但它们的使用略有不同，需要根据具体语境选择使用哪个。
初中状语从句讲义
6条件状语从句
常用引导词：if, unless, 特殊引导词：as/so long as, only if, providing/provided that, suppose that, in case that, on condition that
• We’ll start our project if the president agrees. • You will certainly succeed so long as you keep on trying. • Provided that there is no opposition, we shall hold the meeting here.
4目的状语从句
• • • • • 常用引导词： so that, in order that 特殊引导词： in case, for fear that，in the hope that, for the purpose that, to the end that
• The boss asked the secretary to hurry up with the letters so that he could sign them. • The teacher raised his voice on purpose that the students in the back could hear more clearly.
2地点状语从句
• 2． 地点状语从句常用引导词：where 特殊引导词：wherever, anywhere, everywhere • Generally, air will be heavily polluted where there are factories. • Wherever you go, you should work hard.
初中英语讲义--状语从句
新初三衔接--状语从句定义：由从句担任状语，并起副词作用的句子，称为状语从句，可修饰主句中的谓语动词，其他动词，定语，状语或整个句子等。
引导词：when/while/as(当…时)，before（在…之前）, after(在…之后), since（自从）, as soon as（一…就）, not… until(直到…才) eg: I was doing my homework when my mother came in.Will you watch my clothes while I have a swim ?He did not go to bed until his father came back.注意：when, while和as的区别①when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。
when＝and then; at that moment (正在那个时候)eg: When she came in, I stopped eating.她进来时，我在吃饭。
(come in瞬时动词)When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。
（live延续性的动词）②while引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。
eg:While my wife was reading the newspaper, I was watching TV.(was reading是延续性的动词，was reading和was watching同时发生)③as表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；eg: We always sing as we walk.我们总是边走边唱。
④since:自从……以来。
初三总复习专题精讲(状语从句)
➢ 中考考点设置
4. (1)引导词：so that. (2)结果状语从句引导词：so...that,such...that. (3)so与such
①so+形+a/an+ such+a/an+形+
②so+many/much/few/little+形+ ③such+形+不可数名词/可数名词复数
(4)so...that与too...to和...enough to
He _d_o_e_s_n_’t get up until his mother wakes him up.
so…that, such...that
连词用法比较
1) so…that中的so是个副词，其后只能跟形容词或副词 而such...that中的such是个形容词，后接名词或名词短 语。例如： I’m so tired that I can’t walk any farther. It was such a warm day that he went swimming.
➢ 中考考点设置
1. (1)引导词：when,while,as,before,after,
as soon as,until,since. (2) (3) not...until的同义句替换。
2. (1) 引导词：if, unless. (2) (3) if...not与unless及or的同义句转换。
2) 如果在名词前有many, much, little, few时，用so, 不用such。例如： He has so little education that he is unable to get a job.
考点三 so that：①为了； ② 所以，结果
初中状语从句讲义(有配套练习及答案)
初中状语从句复习讲义魏阿婷1. 掌握状语从句的功能，用法及表达的意义。
2. 掌握状语从句中的时态搭配。
一. 状语从句的作用。
在将状语从句之前，我们先要弄清楚什么是状语。
状语就是在一句话中，表达该句的时间，地点，方式，原因，条件等的成分。
如：I usually get up at ten. He is playing at school happily. He goes to school by bus. I am late, because the traffic is quite heavy.状语从句，顾名思义是做状语的从句，那么它就相当于一个状语，也就是说，它可以与其他状语（如副词状语，介词状语等）在语法上互换。
如：I usually get up at eight. I usually get up after my mother calls me.He was watching TV at home at eight last night.He was watching TV at home when I arrived.He was doing his homework in the classroom.He was doing his homework where I met him.二. 状语从句的用法。
1. 时间状语从句。
时间状语从句做主句的时间状语，表示“当…时，在…时，在…之前/之后，直到…才…，一…就…，等”（连词：when, while, as, before, after, until/till, as soon as等）如：When I got home, my mum was cooking.When you get there, make me a call.He got home while his mum was cooking.Lucy will look after my dog while I am away.As he walked along the street, he sang and danced.Please post the letter for me as you are at the post office.He went away after he locked the door.Y ou can see nothing after the lights go out.He called me before he left.He will call me before he leaves.He didn’t go to sleep until I got back last night.Don’t go across the street until the light turns green.He began to do his homework as soon as he got home.He will begin to do his homework as soon as he gets home.2. 条件状语从句。
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状语从句1.状语从句的定义：状语从句在句中作状语，修饰主句的动词，形容词或副词等，有时修饰整个主句。
I knew him when I was ten. 时间状语从句Teacher will be angry if you are late for class. 条件状语从句He arrived late for class because he got up late.原因状语从句He got up early so that he could get the early bus.目的状语从句He worked so hard that he passed the exam.结果状语从句We should go where the working conditions are difficult.地点状语从句He still worked hard although he was ill.让步状语从句2.分类：（1）时间状语从句。
a.until引导时间状语从句，“直到……时”，从句一般位于主句之后。
如果主句时肯定句时，谓语用延续性动词，强调主句的动作或状态一直持续到从句的动作发生为止，译为“直到……”I stayed there until he came back.如果主句时否定句，谓语用非延续性动词，侧重主句的动作在从句的动作发生之后才开始，译为“直到……才”He didn’t go to bed until 11 o’clock.b.when引导的时间状语从句。
when “当……时“，引导时间状语从句，表示主句的动作和从句的动作同时发生。
I feel very happy when you come to see me.When you are crossing the street, you must be careful.When he knocked at the door, I was sleeping.when引导的时间状语从句中的谓语可以用延续性动词，也可以用非延续性动词。
He was working at the table when I went in.I worked for a foreign company when I was in Shanghai.when 引导的时间状语从句，遵循主将从现原则。
I will call you when he comes back.He will visit you when he comes back home.c.while引导的时间状语从句，译为“与……同时，在……期间”，从句常用延续性动词或表示状态的动词。
They rushed in while we were discussing problems.Mother was cooking while I was playing computer games.d.as soon as引导的时间状语从句，遵循主将从现原则。
as soon as “一……就……”表示从句的动作一发生，主句的动作就马上就发生。
I will tell him about it as soon as he comes back.As soon as he heard the news, he felt very happy.3.so that 引导目的状语从句。
so that “以便“，引导目的状语从句时，一般放在主句后，且不用逗号隔开。
目的状语从句表示动机（即一种可能性），而非事实。
因此，从句带有can/will/could/would/should等情态动词。
He took a taxi so that he could get there earlier.He worked hard so that he could pass the exam.so that “以至于，结果“引导结果状语从句，陈述的是客观事实，常常不带情态动词。
I studied English hard so that I passed the English exam.He runs every day so that he is healthy.重点句型结构：so…that… 引导的结果状语从句adj/advmany/few＋可数名词复数so＋much/little＋不可数名词＋that从句adj＋a/an+可数名词单数Jane is so lovely that we all like to play with her.Tom is so kind a boy that they all want to make friends with him.There are so many books that we want to stay there to read them.There is so little water that we should buy some.such…that…引导的结果状语从句a/an ＋adj+可数名词单数such ＋adj +可数名词复数＋that从句adj+不可数名词He is such a good teacher that we all respect him.They are such difficult questions that few students could answer.There is such sweet bread that many ants appear.although/though的意思一样，译为“尽管；虽然“，位于句首，句末都可以。
主句中不可以出现but,但可以用yet/still等。
类似短语：even if/even though “尽管……”Although/though she smiled, she was angry.He is unhappy though he has a lot of money.6.条件状语从句：if 引导的条件状语从句。
if 译为“如果“引导条件状语从句。
同义短语：as long as “只要，如果”I will go to Wuhan if I have time.If I get up late, my mom will be angry.I will help you as long as you call me.常考点：a.主将从现原则。
（主句是一般将来时，从句用一般现在时代替一般将来时）I’ll catch the early bus if I get up early tomorrow morning.b.主句含有情态动词，从句用一般现在时代替一般将来时。
He can’t be late for c lass if he gets up early tomorrow morning.c.主句为祈使句，从句用一般现在时代替一般将来时。
Please call me if you have time tomorrow.unless 译为“除非，如果不“相当于” if…not”,也遵循主将从现原则。
You can’t learn English well unless you work hard.→You can’t learn English well if you don’t work hard.We will have a picnic unless it rains tomorrow.→W e will have a picnic if it doesn’t rain tomorrow.7.原因状语从句：在句中表原因状语的从句被称为原因状语从句。
常见的引导词有because/since等。
because 表因果关系的语气最强，常用来回答why的提问，所引出的原因往往是听话人不知道或最感兴趣的。
不能和so同时连用。
I like pandas because they are cute.He arrived late for school because he got up late.since 表示人们已知的事实，不需要强调原因，故常译为“既然……”Since Monday is Bob’s birthday, let’s give him a party.Since everyone is here, let’s get started.小试牛刀：1.We’ll stay at home it rains tomorrow.A. andB. ifC. butD. so2.The two companies decided to work together they had common interest.A. becauseB. unlessC. butD. or3. The actor was happy he got a part in a movie, the part was a small one.A. sinceB. whileC. thoughD. unless4. Mom won’t let Dick go out he promises to be back by 10 o’clock tonight.A. ifB. whenC. sinceD. unless5.Our teachers have been with us for nearly three years we came to junior high school. We should thank them for what they have done for us.A. untilB. beforeC. since6.A stupid man tells a woman to shut up, while a wise man tells her that her mouth is quite beautiful it is closed.A. unlessB. sinceC. whenD. though7. I am really proud of my group we’re always discussing and sharing secrets together. How important the group work is !A. becauseB. thoughC. unless8. I got home , my sister was doing her homework.A. WhenB. BecauseC. IfD. Though9.Che n Wei isn’t at school today he is taking a robot competition in Shanghai.A. soB. becauseC. beforeD. if10. Our world will get better and better each of us lives a greener life.A. beforeB. ifC. thoughD. until11. I didn’t accept his help I wanted to try it myself.A. becauseB. thoughC. untilD. unless12.My family always go somewhere interesting the holiday begins.A. as soon asB.soC.so thatD. even though13. Mike didn’t win the race, he was still wearing a smile on his face.A. IfB. SinceC. AlthoughD. Because14.Juile didn’t leave her office the police arrived.A. howeverB. wheneverC. whileD. until15. Mr. Smith has a habit of taking a shower he has breakfast.A. thoughB. beforeC. becauseD. since16. What do you think of your Junior Middle School life?I think it is colorful, I am always busy.A.ifB. thoughC. whileD. until17. you smile at others , they will smile back.A. BeforeB. WhenC. UntilD. Though18. You must make sure your tea is not too hot you drink it.A. beforeB. afterC. sinceD. while19. Phone me you get to Wuzhong.A. sinceB. so thatC. as soon asD. while20. Shall we go for a picnic in the forest park tomorrow ?Yes, it rains heavily.A.ifB. unlessC. untilD. when21. I am in trouble, my classmates will help me out.A. BeforeB. WheneverC. ThoughKEYS：1~5 BACDC 6~10 CAABB 11~15 DACDB 16~21 BBACBB。