时间状语从句课件
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时间状语从句介绍(PPT36张)
翻译下列句子: 你一按按钮,灯就会亮。 The lamp will light instantly you press the button. 他一出现,便一片沉寂。
Directly he appeared ，there was dead silence.
4. 另外还要注意（一……就……） hardly …(had done ) when …( did ) scarcely … when … no sooner … than … (放句首则倒装） e.g. I had hardly/scarcely got home when it started to rain.
5> 在将来时的从句中常用when, 且从句必
须用一般现在时。
You shall borrow the book when I have
finished reading it. 6> when还用在表示 “一……就……”的
句型中。 Hardly/Scarcely had I entered my room when the telephone rang.
原因状语从句中应注意的问题
as, because, for, since 的区别 1> as作为从属连词引导原因状语从句时,语气 不如because 强烈。它引导的从句常放在 句首, 说明原因, 后面的主句则说明结果。 2> because 引导从句时, 语气最强, 直接回答 why的问句。她引导的句子是语意中心所 在, 一般在句后。 (最强答why）
当主从句动作同时发生, 且从句动作
为延续性动词时, 三者可互换。 When/While/As she was making a phone call, I was writing a letter.
高中语法时间状语从句 (共94张PPT)
“I don’t need much more,just a place to rest. I’m tired after all these years.” The boy replied.
“Good!Old tree roots are the best place to lean(倚靠) on and e, come sit down with me and rest.”
having an English class. 2.I was about to go out to play basket-ball when _______it began to rain hard. 3.The train had gone when ______ I got to the station
before表示“要过多久才…”
It will be (is) +一段时间+before从句(does) 要过……才能做 It will not be +一段时间+before从句(does) 要不了…… 就能做 It was +一段时间+before从句(did) 过了……做了…… It was not+一段时间+before从句(did) 没过……做了……
•
While apples riped(成熟), he climbed to the tree top and ate the apples. • When he was tired, he took a nap under the shadow. • As the time went by, he had grown up, he never played around the tree.
时间状语从句PPT-课件
时间状语从句
目录
• 时间状语从句的定义 • 时间状语从句的用法 • 时间状语从句的时态 • 时间状语从句的特殊用法 • 时间状语从句的注意事项
01
时间状语从句的定义
什么是时间状语从句
时间状语从句是用来表示动作或事件发生的时间的从句， 通常放在主句之前或之后，修饰主句中的谓语动词。
时间状语从句通常由连词引导，如when、while、 before、after等。
在某些情况下，过去时间状语从句也可以使用过去进行时态，强调过去某个时间点正在发生的 动作或状态。例如：“When I was walking home, I saw a dog running towards me.”
将来时间状语从句的时态
要点一
将来时间状语从句通常使用一般 将来时态，表示将来某个时间…
在某些情况下，现在时间状语从句也可以使用现 在进行时态，强调正在发生的动作或状态。例如 ：“When I am watching TV, my dog comes and sits next to me.”
过去时间状语从句的时态
过去时间状语从句通常使用一般过去时态，表示过去某个时间点或时间段发生的动作或存在的 状态。例如：“When I was young, I loved to play outside.”
01 时间状语从句是主句的时间状语，表示主句动作
发生的时间点或时间段。 02
示例：I will call you when I finish work. （我下 班后会给你打电话。）
时间状语从句中的虚拟语气
在时间状语从句中，有时需要使用虚 拟语气来表示与实际情况相反的情况 。
示例：If I had known the answer, I would have told you. （如果我早知道 答案，我早就告诉你了。）
目录
• 时间状语从句的定义 • 时间状语从句的用法 • 时间状语从句的时态 • 时间状语从句的特殊用法 • 时间状语从句的注意事项
01
时间状语从句的定义
什么是时间状语从句
时间状语从句是用来表示动作或事件发生的时间的从句， 通常放在主句之前或之后，修饰主句中的谓语动词。
时间状语从句通常由连词引导，如when、while、 before、after等。
在某些情况下，过去时间状语从句也可以使用过去进行时态，强调过去某个时间点正在发生的 动作或状态。例如：“When I was walking home, I saw a dog running towards me.”
将来时间状语从句的时态
要点一
将来时间状语从句通常使用一般 将来时态，表示将来某个时间…
在某些情况下，现在时间状语从句也可以使用现 在进行时态，强调正在发生的动作或状态。例如 ：“When I am watching TV, my dog comes and sits next to me.”
过去时间状语从句的时态
过去时间状语从句通常使用一般过去时态，表示过去某个时间点或时间段发生的动作或存在的 状态。例如：“When I was young, I loved to play outside.”
01 时间状语从句是主句的时间状语，表示主句动作
发生的时间点或时间段。 02
示例：I will call you when I finish work. （我下 班后会给你打电话。）
时间状语从句中的虚拟语气
在时间状语从句中，有时需要使用虚 拟语气来表示与实际情况相反的情况 。
示例：If I had known the answer, I would have told you. （如果我早知道 答案，我早就告诉你了。）
高中英语时间状语从句----公开课课件 (共20张PPT) - 副本
将句子改成强调句_________________________________ It was not until now that I realize the importance of English not…until位于句首时的倒装 Not until now ____ _____ did _____ I realize the importance of English.
Every time he is in trouble, he turns to me for help.
while
趁着，在…时候 Strike while the iron is hot. ____________
I’m cooking while my brother is watching TV. 而…(对比，转折） _______________ While I accept that he is not excellent, I really 虽然，尽管 like the person. __________
风雨过后见彩虹。
Homework :
Composition
Write a composition about one day of your daily life by using when, while, whenever, since, after, before, as soon as, the moment, etc.
2. Why do you want to find another job when you have such a good one. 既然，在 _______ …情况下
3. Whenever he is in trouble, he turns to me for help.
时间状语从句ppt课件
表示过去的过去，即过去的某个动作发生在另一个过去的动作之前。
详细描述
过去完成时态用于描述过去的某个动作发生在另一个过去的动作之前，例如“He said he had finished his work before leaving the office.”（他说他在离开办公室之前已 经完成了工作。）和“When I arrived, she had already left.”（当我到达时，她已
经离开了。）
04
CHAPTER
时间状语从句的注意事项
主句与从句时态要一致
总结词
在时间状语从句中，主句和从句的时态 必须保持一致，以正确表达时间关系。
VS
详细描述
时间状语从句通常表示某个动作发生的时 间或与时间相关的条件，因此主句和从句 的时态必须匹配，以准确表达事件发生的 先后顺序。例如，“当她走进房间时，他 正在看书”中，“走进房间”发生在“正 在看书”之前，因此主句和从句都使用了 过去进行时。
05
CHAPTER
时间状语从句的练习与解析
练习题一解析
总结词
简单时间状语从句
详细描述
这道练习题考察的是简单时间状 语从句的用法，如“when”、 “before”、“after”等，从句 中的时态与主句保持一致。
练习题二解析
总结词
复杂时间状语从句
详细描述
这道练习题涉及的是复杂时间状语从 句，如“not…until”、“as soon as”等，从句中的时态与主句保持一 致，同时要注意从句中时态的先后顺 序。
after的用法
After表示在某个时间点之后，引导时 间状语从句。
例如：After the movie ended, we went for a snack.
详细描述
过去完成时态用于描述过去的某个动作发生在另一个过去的动作之前，例如“He said he had finished his work before leaving the office.”（他说他在离开办公室之前已 经完成了工作。）和“When I arrived, she had already left.”（当我到达时，她已
经离开了。）
04
CHAPTER
时间状语从句的注意事项
主句与从句时态要一致
总结词
在时间状语从句中，主句和从句的时态 必须保持一致，以正确表达时间关系。
VS
详细描述
时间状语从句通常表示某个动作发生的时 间或与时间相关的条件，因此主句和从句 的时态必须匹配，以准确表达事件发生的 先后顺序。例如，“当她走进房间时，他 正在看书”中，“走进房间”发生在“正 在看书”之前，因此主句和从句都使用了 过去进行时。
05
CHAPTER
时间状语从句的练习与解析
练习题一解析
总结词
简单时间状语从句
详细描述
这道练习题考察的是简单时间状 语从句的用法，如“when”、 “before”、“after”等，从句 中的时态与主句保持一致。
练习题二解析
总结词
复杂时间状语从句
详细描述
这道练习题涉及的是复杂时间状语从 句，如“not…until”、“as soon as”等，从句中的时态与主句保持一 致，同时要注意从句中时态的先后顺 序。
after的用法
After表示在某个时间点之后，引导时 间状语从句。
例如：After the movie ended, we went for a snack.
初中英语时间状语从句PPT课件
• (她入党二十年了。)(主句中的动词表示的不是延续动 作，而是状态， 用现在时。）
#
第十八页，共21页。
• I have worked in this school since I graduated from Beijing University.
• It is ten years since she began to learn English.
finished her homework.
• (她一直到写完作业才睡觉。)
#
第二十一页，共21页。
You can’t do your homework while you’re watching TV.
#
第九页，共21页。
as
• 由as引导的时间状语从句，[表示时间]当..., 的时候 , 一边...一边, 随 着。
• 如： • 1. She sang as she worked. • 她一边工作一边唱歌。 • 2. I saw him as he was getting off the bus. • 正当他下公共汽车时, 我看见了他。
#
第十四页，共21页。
（三）、另外,when和while的区别还在于： while引导的时间状语从句多用进行时态, 而when引导的时间状语从句多用一般时 态.
例如：1、While they were talking ,the bell rang.正在他们谈话的时候,上课铃响 了.
2、I was doing my homework when my
#
第十二页，共21页。
when、while
（一）、when,while都有“当……时候”的意思. when既可表示某一点时间,也可以表示某一段时间 .在when引导 的时间状语从句中,其谓语动词可以是延续性的,也可以是非延续 性的,可与主句中的谓语动词同时发生,也可在其后发生. 例如：1、I was just reading a book when she came into my room.她走进我房间时,我正在看书.
#
第十八页，共21页。
• I have worked in this school since I graduated from Beijing University.
• It is ten years since she began to learn English.
finished her homework.
• (她一直到写完作业才睡觉。)
#
第二十一页，共21页。
You can’t do your homework while you’re watching TV.
#
第九页，共21页。
as
• 由as引导的时间状语从句，[表示时间]当..., 的时候 , 一边...一边, 随 着。
• 如： • 1. She sang as she worked. • 她一边工作一边唱歌。 • 2. I saw him as he was getting off the bus. • 正当他下公共汽车时, 我看见了他。
#
第十四页，共21页。
（三）、另外,when和while的区别还在于： while引导的时间状语从句多用进行时态, 而when引导的时间状语从句多用一般时 态.
例如：1、While they were talking ,the bell rang.正在他们谈话的时候,上课铃响 了.
2、I was doing my homework when my
#
第十二页，共21页。
when、while
（一）、when,while都有“当……时候”的意思. when既可表示某一点时间,也可以表示某一段时间 .在when引导 的时间状语从句中,其谓语动词可以是延续性的,也可以是非延续 性的,可与主句中的谓语动词同时发生,也可在其后发生. 例如：1、I was just reading a book when she came into my room.她走进我房间时,我正在看书.
时间状语从句 ppt课件
while 然而
我在做功课，弟弟却在玩游戏。
I was doing my homework while my brother was playing games.
我已经工作五年了，而你还在读书。
I have worked for five years while you are still at school.
在某事发生的过程中另一事发生
Just when/while/as he was speaking there was a loud explosion.
正当他在说话的时候，一声巨响。
When/while/as I was cooking, the telephone rang.
我正在做饭的时候，电话响了。
7
时间状语从句的连接词 (1)
when while as
8
时间状语从句的连接词 (ll, not…until as soon as/ the moment
9
时间状语从句的连接词 (3)
hardly…when no sooner…than once each time; every time
22
when, while or as?
3．当主句、从句动作同时进行，表示“随 着……”；“一边……，一边……”之意时 ，只
能用 as。 ① As the time went on，the weather got
worse. 随着时间的推移，天气变得越来越糟糕。 ②The little girls sang as they went． 小姑娘们一边走，一边唱。 ③The sad mother sat on the roadside，
He saw that she was smiling as she was reading.
时间状语从句PPT课件ppt课件
some stamps? A．As B．while C．Because D．If
连接词类别 作 用
例句
as when
while
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可以和延续性动词连用，也可以和短暂性动 词连用； when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。
stay home. 5. You can do it as you like. 6. Old as he is, he is still energetic.
SUCCESS
THANK YOU
2019/6/5
• Fill in the blanks with “when, while, aswh”en
• 1______ you meet a word you don't know, consult the
dictionary.
as
• 2.TAhse students took notes _____ they listened.
• 3._____ thewhwiilned rose ,the noise increased.
Adverbial Clauses
条件状语
结果状语
地点状语
目的状语
原因状语 时间1.准确掌握每一个连词的含义。 2.注意主句和从句的时态呼应。
(1) as , while , when
• Which do you choose?
－I′m going to the post office. －_____ you are there, can you buy me
连接词类别 作 用
例句
as when
while
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可以和延续性动词连用，也可以和短暂性动 词连用； when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。
stay home. 5. You can do it as you like. 6. Old as he is, he is still energetic.
SUCCESS
THANK YOU
2019/6/5
• Fill in the blanks with “when, while, aswh”en
• 1______ you meet a word you don't know, consult the
dictionary.
as
• 2.TAhse students took notes _____ they listened.
• 3._____ thewhwiilned rose ,the noise increased.
Adverbial Clauses
条件状语
结果状语
地点状语
目的状语
原因状语 时间1.准确掌握每一个连词的含义。 2.注意主句和从句的时态呼应。
(1) as , while , when
• Which do you choose?
－I′m going to the post office. －_____ you are there, can you buy me
时间状语从句ppt课件
时间状语从句的省略
省略主语和助动词
当从句的主语和助动词与主句的主语一致时，从 句的主语和助动词可以省略。
省略be动词
当从句中的动词是be动词时，be动词可以省略。
省略连词
当从句和主句之间没有连词连接时，连词可以省 略。
时间状语从句的倒装
倒装句式
时间状语从句中的主语和动词的顺序可以颠倒，形成倒装句式。
总结词
表示一个动作从过去某时开始一直持续 到现在
VS
详细描述
Since通常用于描述一个从过去某时开始 一直持续到现在的动作或状态。例如： “I have been waiting since 9 o'clock.”（我从9点钟就开始等了。）
03
CATALOGUE
时间状语从句的时态搭配
现在时与过去时的搭配
时态
时间状语从句的时态要与 主句的时态相呼应，一般 遵循“主将从现”的原则 。
语序
时间状语从句通常是陈述 语序。
时间状语从句的作用与重要性
作用
时间状语从句可以用来描述动作发生的时间、持续时间或动作的先后顺序，从 而使句子更加准确和清晰。
重要性
在英语语法和写作中，正确使用时间状语从句对于表达时间关系和增强文章逻 辑性非常重要。掌握时间状语从句的构成要素和运用技巧有助于提高英语水平 和写作能力。
主句的意义和语气对时间状语从句的意义和语气有影响。例如，如果主 句是疑问句，那么时间状语从句也可能需要使用疑问语气。
主句中的特定词汇或结构可以与时间状语从句形成对照或对比，从而强 调某些信息。
06
CATALOGUE
时间状语从句的常见错误分析
混淆不同类型的时间状语从句
01
一般现在时态的时间状语从句
时间状语从句课件( ppt课件
• 一、 when/while 的区别
• 1.when表示主从句两个动作同时发生或先后 发生。而while表示主从句两个动作同时发生 或强调主句的动作在从句动作进行期间发生。
(1)_W__h_il_e_ they are waiting for the New Year, they listen to music , sing songs and dance.
W_h_e_n_/W__h_il_e/_A_s_she was singing, we all lost ourselves in her beautiful voice.
注意：延续性动词表达的动作能够延续，如：keep保存，维持；walk走路；read 阅读等；非延续 2020性/12动/1词2 也称瞬间动词，所表达的动作不能够延续。如：hear听到；return 归还；see看6 见。
street___w_h__en___ I caught sight of a tailor’s
shop.
2020/12/12
7
二、when／while／as的用法。
when表示从句动作和主句动作同时发生，或先于主句动作； while表示从句的动作与主句动作同时发生，并有延续的含义； as从句动作与主句动作同时发生，常译为“一边…一边…” 。 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.
suddenly the storm started.
A. when
B. while
C. until
D. before
2. He was about to tell me the secret __D____someone patted （拍）him on the
时间状语从句语法ppt课件
3
6. 一...就... (1) the moment/ the minute/ the second/ the instant...
Th_e__m__o_m_e_n_t_I_a_r_r_iv_e_d__h_o_m__e (我一到家), it began to rain. (2) immediately/ directly/ instantly...
1. when (1) When
Iw_h_e_n__I_g_o_t_t_o_t_h_e__a_ir(p到or达t 机场),
the
guests
had
left.
When they heard the news, they jumped with joy. = When _h_e_a_r_in_g____ the news, they jumped with joy. = While _h_e_a_r_in_g______ the news, they jumped with joy.
Children ran out i_m__m_e_d_i_a_te_l_y_ the bell rang. (ring) (3) hardly/ scarcely.... when; no sooner... than...
I had hardly arrived home w__h_e_n_ it began to rain. (4) on ng....
people find it difficult to make ends meet to a great degree. (3) A__s__ is known to us all, he is an artist.
_W_h_a_t_ is known to us all is that he is an artist. _It____ is known to us all that he is an artist. (4) This trend, which was started by the medical community （医学界） as a method of fighting heart disease, has had some unintended(无意识的) side effects.
6. 一...就... (1) the moment/ the minute/ the second/ the instant...
Th_e__m__o_m_e_n_t_I_a_r_r_iv_e_d__h_o_m__e (我一到家), it began to rain. (2) immediately/ directly/ instantly...
1. when (1) When
Iw_h_e_n__I_g_o_t_t_o_t_h_e__a_ir(p到or达t 机场),
the
guests
had
left.
When they heard the news, they jumped with joy. = When _h_e_a_r_in_g____ the news, they jumped with joy. = While _h_e_a_r_in_g______ the news, they jumped with joy.
Children ran out i_m__m_e_d_i_a_te_l_y_ the bell rang. (ring) (3) hardly/ scarcely.... when; no sooner... than...
I had hardly arrived home w__h_e_n_ it began to rain. (4) on ng....
people find it difficult to make ends meet to a great degree. (3) A__s__ is known to us all, he is an artist.
_W_h_a_t_ is known to us all is that he is an artist. _It____ is known to us all that he is an artist. (4) This trend, which was started by the medical community （医学界） as a method of fighting heart disease, has had some unintended(无意识的) side effects.
时间状语从句PPT课件
Adverbial Clauses
2021/6/30
1
条件状语
结果状语
地点状语
目的状语
原因状语 时间状语
比较状语
方式状语 让步状语
2021/6/30
2
连接词类别 作 用
例句
as when
while
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。
• Which do you choose? －I′m going to the post office. －_____ you are there, can you buy me some
stamps? A．As B．wHale Waihona Puke ile C．Because D．If
2021/6/30
4
While ,when 在句中的不同含义:
1.When ／While ／As we were dancing，a stranger came in．（dance为延续性动词） 。
2.Please don’t talk so loud while others are working.
2021/6/30
3
(1) as , while , when
2021/6/30
6
结束语
若有不当之处，请指正，谢谢！
while I am fond of folk music. d. Strike while iron is hot.
1. They were walking down the street when they saw an accident. 2. I had just got home when it began to rain. 3. I was about to go swimming when our guide stopped me. 4. It's cold when it snows.
2021/6/30
1
条件状语
结果状语
地点状语
目的状语
原因状语 时间状语
比较状语
方式状语 让步状语
2021/6/30
2
连接词类别 作 用
例句
as when
while
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。
• Which do you choose? －I′m going to the post office. －_____ you are there, can you buy me some
stamps? A．As B．wHale Waihona Puke ile C．Because D．If
2021/6/30
4
While ,when 在句中的不同含义:
1.When ／While ／As we were dancing，a stranger came in．（dance为延续性动词） 。
2.Please don’t talk so loud while others are working.
2021/6/30
3
(1) as , while , when
2021/6/30
6
结束语
若有不当之处，请指正，谢谢！
while I am fond of folk music. d. Strike while iron is hot.
1. They were walking down the street when they saw an accident. 2. I had just got home when it began to rain. 3. I was about to go swimming when our guide stopped me. 4. It's cold when it snows.
时间状语从句课件 PPT
• Fill in the blanks with “when, while”
A.___w_h_eynou meet a word you don't know, consult the dictionary. B..She called __w_h_i_l_e_ I was out. C.We must strike __w_h_i_l_e the iron is hot. D.___W_h__e_n_you have finished your work, you may have a rest. E. I was just reading a book __w_h__e_nshe came into my room.
方式状语Байду номын сангаас让步状语
(1) as , while , when
• Which do you choose? －I′m going to the post office. －_____ you are there, can you buy me some
stamps? A．As B．while C．Because D．If
While ,when 在句中的不同含义:
a. While I was walking down the street, I b. came across an old friend. c. While I really don’t like art, I find his work impressive. He likes pop music,
adverbialclauses条件状语条件状语原因状语原因状语目的状语目的状语地点状语地点状语比较状语比较状语结果状语结果状语时间状语时间状语让步状语让步状语方式状语方式状语whichdoyouchoose
时间状语从句公开课PPT课件
• 当我正在写作业时，我发现我的笔坏了。 • 我妈妈让我去买菜，当她正在做饭时。 • 当我不开心时，我就唱歌。 • 当我正在写作业时，我妈妈让我去买菜。
从句
主句
第14页/共26页
before
• We must finish the work before （在……之前） the teacher gets angr y. • 我们还没来得及说什么他就走了。 • He had gone before we could say anything to him. • 我们走了一整天才找到水。 • We had walked for a whole day before we found water
第18页/共26页
地点状语从句
Keep it where you can see it. 把它放在你看得
见的地方。
Sit wherever you like. 你爱坐哪儿都可以
第19页/共26页
1.I found my books _____ I had left
√them.
• A where
B that/which
地点状语从句
2.I know the park______ we spent the whole day.
√A where
B that/which
定语从句
第20页/共26页
地点状语从句和定语从句的区别
定语从句
This is the house where I lived two years
ago.
A. comes B. came C. will come D. is coming
B
A
第11页/共26页
时间状语从句的省略
时间状语从句讲解PPT课件
③既然，在…的情况下 Why do you want to find a.nother job when you ha1ve
such a good one
It was foolish of you to take a taxi when you could walk there in five minutes How can you hope for mercy when you show none？
状语从句
时间，地点，原因，条件，让步，目的，结果，方 式，比较九种状语从句 一、时间状语从句 引导词有 when, whenever, as, while, after, before, until/till, since, once, as soon as
1 when ①在… 的时候
② 这时 be doing…when be about to do …when had just done…when
5. We need to stay connected to our own families . We’ll never turn back the clock to keep families from breaking. But parents can help by telling their children stories about their grandparents, aunts and cousins.
W_h__il_e you are in the post office, buy some
stamps for me.
.
3
②对比转折 / but / however ③虽然，尽管=though/although
While I admit his good points, I can see his shortcomings.
such a good one
It was foolish of you to take a taxi when you could walk there in five minutes How can you hope for mercy when you show none？
状语从句
时间，地点，原因，条件，让步，目的，结果，方 式，比较九种状语从句 一、时间状语从句 引导词有 when, whenever, as, while, after, before, until/till, since, once, as soon as
1 when ①在… 的时候
② 这时 be doing…when be about to do …when had just done…when
5. We need to stay connected to our own families . We’ll never turn back the clock to keep families from breaking. But parents can help by telling their children stories about their grandparents, aunts and cousins.
W_h__il_e you are in the post office, buy some
stamps for me.
.
3
②对比转折 / but / however ③虽然，尽管=though/although
While I admit his good points, I can see his shortcomings.
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A．As
B．while
C．Because
D．If
连接词类别
作用 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。
例句 1.She came up as I was cooking.（同时） 2.The runners started as the gun went off.（几 乎同时） 1.When we were at school, we went to the library every day.（在一段时间内） 2.Sorry，I was out when you called me．（ call为短暂性动词）对不起，你打电话时我 刚好外出了。 3. 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。 1.When ／While ／As we were dancing，a stranger came in．（dance为延续性动词） 。 2.Please don’t talk so loud while others are working.
• before用法
1.We had sailed four days and four nights before we saw land. 2. We hadn’t run a mile before he felt tired. ……才 还没有/不到……就…… 3. Please write it down before you forget it.趁……（还未） 4. Before I could get in a word, he had measured 还没来得及……
Judge the meanings of “as”.
1. As I left the house, I forgot the key.
2. As I get older, I get more optimistic. 3. He looked behind as he went. 4. As the weather is so bad, we have to stay home.
as
when
when可以和延续性动词连用，也可以和短暂性动 词连用； when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。
while
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)。 主句中的动作或事情是在从句中的动作或事情的 进展过程中发生，从句中的动词一般要用延续性 动词。
5. You can do it as you like.
6. Old as he is, he is still energetic.
• Fill in the blanks with “when, while, as”
when you meet a word you don't know, consult the • 1______ dictionary. as • 2.The students took notes _____ they listened. As the wind rose ,the noise increased. • 3._____ while I was out. • 4.She called _______ • 5.We must strike while ______ the iron is hot. When • 6.________you have finished your work, you may have a rest. when she came into my room. • 7. I was just reading a book ______Fra bibliotekme.
注意：before从句中谓语不用否定式。 Before they reached the station, the train had gone.
• 含有before的句型结构： 1. It will be / was＋一段时间＋before…“过多久才” • It_________________________(还要过两年)he leaves the country. • It ______________________(过了很长一段时间) before he got to sleep again. 2. It will be / was + not＋一段时间＋before… “不多久就……” • It wasn’t two years before he left the country. • It was not long before he came back.
Adverbial Clauses
条件状语
结果状语
地点状语
目的状语
比较状语
方式状语 让步状语 时间状语
原因状语
• 掌握状语从句的关键
1.准确掌握每一个连词的含义。 2.注意主句和从句的时态呼应。
(1) as , while , when • Which do you choose? －I′m going to the post office. －_____ you are there, can you buy me some stamps?
1)They were walking down the street when they saw an accident. 2) I had just got home when it began to rain. 3) I was about to go swimming when our guide stopped me. 4) It's cold when it snows.
• While ,when 在句中的不同含义: While I was walking down the street, I came across an old friend. ( while=_______) While I really don’t like art, I find his work impressive. ( while =_________ ) He likes pop music, while I am fond of folk music. Strike while iron is hot.