区别状语从句中的when

区别状语从句中的when, while和as的用法

一．when，while，as在时间状语从句中的区别：

①三者均可表示“当……的时候”，如果主句表示的是短暂的动作，而从句表示的是一段时间，三者可通用。如：

I met Kang Li as／when／while I was walking along the street．当我沿街散步时碰见了康丽。

②when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。如：

It was snowing when we got to the airport．当我们到达机场时，天正下着雪。（不能用while）

③as强调主句与从句表示的动作同时发生，as常表示“随着……”；“一边……，一边……；while强调主句表示的动作持续于while所指的整个时间内；when可指主、从句所述动作同时或先后发生。如：

As the time went on，the weather got worse．（as表示“随着……”之意）

He sang as he went along．他边走边唱。

Please write while I read．我读的时候，请写下来。

When he reached home，he had a little rest．回到家后，他休息了一会儿。

④when用于表示“一……就……”的句型中（指过去的事情）。

somebody had hardly（＝scarcely）done …when．．．＝Hardly ／Scarcely had somebody

done …when．．．

①I had hardly ／scarcely closed my eyes when someone knocked at the door．＝Hardly ／Scarcely had I closed my eyes when someone knocked at the door．我刚一闭上眼，就有人在敲门了。

二.when, while和as都可引导让步状语从句：

①．when引导让步状语从句，意为“尽管，虽然”相当于though或although: They stopped trying when they might have succeeded next time.

②while引导让步状语从句，相当于although ，是较为正式的书面语:

While I am willing to go, I would like it better that you went.

③as引导让步状语从句必须倒装，从句中的表语，状语或动词原形置于句首，若表语为名词，前置时省略冠词。

Child as he is, he knows a lot.

Much as I like it, I will not buy it, for it’s too expensive.

Try as he might, he couldn’t find a job.

三.when和while可用作并列连词:

①when作并列连词，意为“突然，正在那个时候”常运用于以下句型中：Somebody be about to do…when…

Somebody be on the point of doing…when…

Somebody be doing… when…

Somebody had done…when…

We were having a meeting when someone broke in.

We were about to set off on our way, when it suddenly began to rain.

②作并列连词，意为“而，却”，表示对比。

He likes pop music, while I am fond of music.

四.when和as用于原因状语从句中:

①when=since, now that…“既然”

Why do you want a new job when you’ve got such a good one already?

②意为“因为”，指说话双方都知道的原因。

As he was not ready in time, we went without him.

组题练习：

1. Success came ______ she began to play leading parts in radio plays.

A. While

B. as

C. when

D. if

2. The atmosphere gets thinner and thinner _______ the height increases.

A. When

B. as

C. while

D. since

3. I was just about to go to sleep______ there was a loud knock on the door.

A. While

B. when

C. as

D. since

4. They were surprised that a child should work out the problem_____ they themselves couldn’t.

A. When

B. where

C. until

D. while

5. We were swimming in the lake______ suddenly the storm started.

A. When

B. while

C. until

D. before

6. I do every single bit of housework______ my husband Bob just does the dishes now and then. (04高考广西卷)

A. Since

B. while

C. when

D. as

7. _____ I accept that he is not perfect, I do actually like the person.(04高考江苏卷)

A. While

B. Since

C. Before

D. Unless

8. Jasmine was holidaying with her family in a wildlife park_____ she was bitten on the leg by a lion.(04高考上海卷)

A. When

B. while

C. since

D. once

9. _____modeling business is by no means easy to get into, the good model will always be in demand.(o4高考浙江卷)

A. While

B. Since

C. As

D. If

10. All gases and most liquids and solids expand ______ heated.

A. as

B. while

C. before

D. when

11. We have only three books______ we need five.

A. as if

B. if

C. when

D. even though

12.How can we explain it to you_____?

A. while you are listening

B. unless you will listen

C. as you won’t listen

D. when you won’t list en

13._______ I had to work to support my family.

A. When I was a little child

B. While I was a little child

C. As I was a little child

D. Before I was a little child

14._____________, helicopters flew to the burning building.

A. While the firefighters were trying to control the fire

B. As the firefighters were trying to control the fire

C. As soon as the firefighters were trying to control the fire

D. After the firefighters had controlled the fire

15. The husband was looking after the baby__________.

A. after his wife cooked in the kitchen

B. as his wife was cooking in the kitchen

C. when his wife was cooking in the kitchen

D. while his wife was cooking in the kitchen

16. Look at the sun. It is shining._______ it’s sunny, let’s go for a walk.

A. as

B. when

C. if

D. as soon as

17. The sad mother sat on the roadside，shouting_______ she was crying.

A. what

B. when

C. as

D. which

18. Hardly had we entered the room ______ it began to rain.

A. while

B. as

C. then

D. when

19. ___________, he does get annoyed with her sometimes.(04).

A. Although much he likes her

B. Much although he likes her

C. As he likes her much

D. Much as he likes her

20.______ years go by，China is getting stronger and richer

. A. When B. As C. While D. Since

Keys:1-10CBBDA/BAAAD

11-20CDAAD/ACDDB

When引导的定语从句与时间状语从句的区分

一、从句是如何出题的？ 1. 时态 2. 考连接词 3. 考语言顺序 二、学好从句的两个基本条件 1. 时态 2. 从句的三个必须:①必须是句子；②必须有连接词；③必须是陈述句 三、状语从句、宾语从句、定语从句重点 1.如何判断何种从句 2. 从句的时态 3. 从句的连接词与扩展 4. 经典单选、从句与选词、长句子分析 四、如何判断三种从句 1. 状语从句无先行词 2. 宾语(表语)从句无先行词有动词或词组 3. 定语从句先行词多为名词或代词 一、When引导的定语从句与时间状语从句的区分 1. when的译法不同。在时间状语中，when 翻译成“当……的时候” I want to be a teacher when I grow up. 当我长大的时候，我要做一名老师。在定语从句中，when不翻译。I won't forget the day when he says he loves me. 我不会忘记他说爱我的那一天。 2. 在时间状语中，when从句前面或后面是句子；定语从句中，when 从句不能位于句首，且通常when前为表示时间的名词day、year等。 3. when在从句的作用不同。在时间状语从句中，when是连词，只起连接主句和从句的作用，不做从句的任何成分。不过when引导的时间状语从句修饰主句的谓语，做主句的时间状语。 在定语从句中，when是关系副词，在从句中代替先行词做从句的时间状语，修饰从句的谓语。 例1 I will always remember the days when I lived with my

grandparents in the country. 例2 I always remember the days in the country when I see the photo of my grandparents. 点评：例1意为“我会永远记得跟我祖父母一起住在乡下的那些日子”，其中when 引导的是一个定语从句, 修饰the days, when在从句中作时间状语。例2意为“当我看到祖父母的照片时，总是会想起在乡下的那些日子”，其中when 引导的从句并不修饰前面的名词the country，因此可判定为时间状语从句。 例1中的when可用in which替代，即从句可改为...in which I lived with my grandparents in the country. 例2中从句前有名词，但根据句意可 知并不是从句所修饰的对象，也不能用“介词+ which”来替代。 二、判断关系代词与关系副词 方法一：用关系代词，还是关系副词完全取决于从句中的谓语动词。及物动词后面无宾语，就必须要求用关系代词；而不及物动词则要求用关系副词。例如： This is the mountain village where I stayed last year. 这是我去年呆过的山村。 I'll never forget the days when I worked together with you. 我永远不会忘记与你共事的日子。 判断改错： 1. This is the mountain village where I visited last year. 2. I will never forget the days when I spent in the countryside. 3. This is the mountain village （which）I visited last year.

过去进行时、when和while引导时 间状语从句的区别

过去进行时过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作，常和表过去的时间状语连用，如： 1. I was doing my homework at this time yesterday. 昨天的这个时候我正在做作业。 2. They were waiting for you yesterday. 他们昨天一直在等你。 3. He was cooking in the kitchen at 12 o'clock yesterday. 昨天12点，他正在厨房烧饭。 过去进行时的构成： 肯定形式：主语+was/were+V-ing 否定形式：主语+was not (wasn't)/were not (weren't)+V-ing 疑问形式：Was/Were+主语+V-ing。 基本用法： 1. 过去进行时表示过去某一段时间或某一时刻正在进行的动作。常与之连用的时间状语有，at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+点钟+yesterday (last night / Sunday…)，when sb. did sth.等时间状语从句，如： 1）What were you doing at 7p.m. yesterday? 昨天晚上七点你在干什么？ 2）I first met Mary three years ago. She was working at a radio shop at the time. 我第一次遇到玛丽是在三年前，当时她在一家无线电商店工作。 3）I was cooking when she knocked at the door. 她敲门时我正在做饭。 2. when后通常用表示暂短性动词，while后通常用表示持续性动词，而while所引导的状语从句中，谓语动词常用进行时态，如： When the car exploded I was walking past it. = While I was walking past the car it exploded. 3. when用作并列连词时，主句常用进行时态，从句则用一般过去时，表示主句动作发生的过程中，另一个意想不到的动作发生了。如： I was walking in the street when someone called me. 我正在街上走时突然有人喊我。 4. when作并列连词，表示“（这时）突然”之意时，第一个并列分句用过去进行时，when引导的并列分句用一般过去时。如：

When引导的定语从句与时间状语从句的区分

一、从句是如何出题的 1. 时态 2. 考连接词 3. 考语言顺序 二、学好从句的两个基本条件 1. 时态 2. 从句的三个必须:①必须是句子；②必须有连接词；③必须是陈述句 三、状语从句、宾语从句、定语从句重点 1.如何判断何种从句 2. 从句的时态 3. 从句的连接词与扩展 4. 经典单选、从句与选词、长句子分析 四、如何判断三种从句 1. 状语从句无先行词 2. 宾语(表语)从句无先行词有动词或词组 3. 定语从句先行词多为名词或代词 一、When引导的定语从句与时间状语从句的区分 1. when的译法不同。在时间状语中，when 翻译成“当……的时候”I want to be a teacher when I grow up. 当我长大的时候，我要做一名老师。在定语从句中，when不翻译。I won't forget the day when he says he loves me. 我不会忘记他说爱我的那一天。 2. 在时间状语中，when从句前面或后面是句子；定语从句中，when从句不能位于句首，且通常when前为表示时间的名词day、year等。 3. when在从句的作用不同。在时间状语从句中，when是连词，只起连接主句和从句的作用，不做从句的任何成分。不过when引导的时间状语从句修饰主句的谓语，做主句的时间状语。 在定语从句中，when是关系副词，在从句中代替先行词做从句的时间状语，修饰从句的谓语。 例1 I will always remember the days when I lived with my grandparents in the country. 例2 I always remember the days in the country when I see the photo of my grandparents. 点评：例1意为“我会永远记得跟我祖父母一起住在乡下的那些日子”，其中when 引导的是一个定语从句, 修饰the days, when在从句中作时间状语。例2意为“当我看到祖父母的照片时，总是会想起在

过去进行时、when和while引导时间状语从句的区别

过去进行时 过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作，常和表过去的时间状语连用，如： 1. I was doing my homework at this time yesterday. 昨天的这个时候我正在做作业。 2. They were waiting for you yesterday. 他们昨天一直在等你。 3. He was cooking in the kitchen at 12 o'clock yesterday. 昨天12点，他正在厨房烧饭。 过去进行时的构成： 肯定形式：主语+was/were+V-ing 否定形式：主语+was not (wasn't)/were not (weren't)+V-ing 疑问形式：Was/Were+主语+V-ing。 基本用法： 1. 过去进行时表示过去某一段时间或某一时刻正在进行的动作。常与之连用的时间状语有，at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+点钟+yesterday (last night / Sunday…)，when sb. did sth.等时间状语从句，如： 1）What were you doing at 7p.m. yesterday? 昨天晚上七点你在干什么？ 2）I first met Mary three years ago. She was working at a radio shop at the time. 我第一次遇到玛丽是在三年前，当时她在一家无线电商店工作。 3）I was cooking when she knocked at the door. 她敲门时我正在做饭。 2. when后通常用表示暂短性动词，while后通常用表示持续性动词，而while所引导的状语从句中，谓语动词常用进行时态，如： When the car exploded I was walking past it. = While I was walking past the car it exploded. 3. when用作并列连词时，主句常用进行时态，从句则用一般过去时，表示主句动作发生的过程中，另一个意想不到的动作发生了。如： I was walking in the street when someone called me. 我正在街上走时突然有人喊我。 4. when作并列连词，表示“（这时）突然”之意时，第一个并列分句用过去进行时，when引导的并列分句用一般过去时。如： 1）I was taking a walk when I met him. 我正在散步，突然遇见了他。 2）We were playing outside when it began to rain. 我们正在外边玩，这时下起雨来了。 过去进行时和一般过去时的用法比较： 1）过去进行时表示过去正在进行的动作，而一般过去时则表示一个完整的动作。 例如：They were writing letters to their friends last night. 昨晚他们在写信给他们的朋友。（没有说明信是否写完） They wrote letters to their friends last night.

When引导的三类从句

When引导的三类从句 When作为连词,可以引导名词从句、定语从句和时间状语从句。请看下面这段短文,其中就出现了when引导的这三类从句。 1. (a) Many students say that their time at university is when they can experience pure love. (b) This is a time when love is innocent when two people come together for love, rather than a house, car or a good job. There are no pressures from parents to get married as they are still young. (c)It is a time when they can choose who they love and how they love away from outside pressure. Even though the relationship may break up, it will bring sweet memories in later years. 很多学生都说,在大学期间才能经历真正纯真的爱情。在此期间,爱是单纯的,两个人走到一起完全是因为爱,而不是为了房子、车子或者好工作。由于还年轻,他们也不会迫于父母的压力而结婚。这一期间,他们可以不受外界的任何干扰而去选择自己爱的对象和爱的方式。即使最终两人分手了,这期间的爱情也会成为日后甜蜜的回忆。 上面的小短文中出现了四个when引导的从句,下面笔者逐一分析各句的结构与类型。首先来看a句: a. Many students say that their time at university is when they can experience pure love. 我们可以看到,这里when引导的从句用在了系动词is后,也就是说,这一从句是一个表语从句(名词从句的一种)。这里的when相当于

when,while,as引导时间状语从句的区别

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。 一、when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。 ①Why do you want a new job when youve got such a good one already？（get 为短暂性动词）你已经找到如此好的工作，为何还想再找新的？ ②Sorry，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。 ③Strike while the iron is hot．（is为延续性动词，表示一种持续的状态）趁热打铁。 ④The students took notes as they listened．（listen为延续性动词）学生们边听课边做笔记。 二、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。 1．从句动作在主句动作前发生，只用when。 ①When 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。 ②When 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。 2．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。 3．当主句、从句动作同时进行，从句动作的时间概念淡化，而主要表示主句动作发生的背景或条件时，只能用as。这时，as常表示“随着……”；“一边……，一边……”之意。 ①As the time went on，the weather got worse．（as表示“随着……”之意） ②The atmosphere gets thinner and thinner as the height increases．随着高度的增加，大气越来越稀薄。 ③As years go by，China is getting stronger and richer．随着时间一年一年过去，中国变得越来越富强了。 ④The little girls sang as they went．小姑娘们一边走，一边唱。 ⑤The sad mother sat on the roadside，shouting as she was crying．伤心的妈妈坐在路边，边哭边叫。 4．在将来时从句中，常用when，且从句须用一般时代替将来时。 ①You shall borrow the book when I have finished reading it．在我读完这本书后，你可以借阅。 ②When the manager comes here for a visit next week，Ill talk with him about this．下周，经理来这参观时，我会和他谈谈此事。 三、when用于表示“一……就……”的句型中（指过去的事情）。 sb．had hardly（＝scarcely）done sth．when．．．＝Hardly ／Scarcely had sb．done sth．when．．．

引导的时间状语从句

1.由when, while, as引导的时间状语从句。 When you think you know nothing, then you begin to know something.当你以为自己一无所知的时候，你就是在开始知道一些事物了。When truth is buried under the ground it grows, it chokes, it gathers such an explosive force that on the day it bu rsts out , it blows up everything with it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！ Strike while the iron is hot. 趁热打铁。 Will you watch my clothes while I have a swim? 我游泳的时候，请你照看一下我的衣服。 You can feel the air moving as your hand pushes through it . 当你的手在空气中挥动的时候，你就能感觉到空气在流动。 Our headmaster laughed as she spoke.我们的校长边谈边笑。 when, while和as的区别 1. when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when有时表示“就在那时”。 例如： When she came in, I stopped eating.她进来时，我在吃饭。(瞬时动词) When I lived in the countryside, I used to carry some wate r for him.当的住在农村时，我常常为他担水。（延续性的动词） We were about to leave when he came in.我们就要离开，就在那时他进来了。 2. While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）。并且while有时还可以表示对比。例如： 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) I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比） 3. As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；as也可以强调“一先一后。例如： We always sing as we walk.我们总是边走边唱。（as表示“一边……一边”） As we was going out, it began to snow.当我们出门时，开始下雪了。（as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间） as when while的辨析 as when while都表示主、从句动作同时发生，三者差异如下：

when 引导的从句用法一

when 引导的从句用法一、引导时间状语从句 1. 表示"当……的时候",相当于at the moment when。例如: When we got to the cinema, the film had been on for half an hour. 当我们到达电影院时,电影已放映半小时了。She was writing a letter when I came in. 当我进来时,她在写信。 2. 表示"一……就……",相当于as soon as。例如: The students got up when the bell rang. 铃声一响,学生们就起床了。I'll ring you up when I arrive in Beijing. 我一到北京就给你打电话。 3. 表示"就在这时;当时",相当于just at the moment或just then .例如: We were about to start out when it began to rain heavily. 我们正要启程,就在这时,天下起了大雨。 He had just returned from one business trip when he was asked to make another one. 他刚刚出差回来,这时,又叫他再次出差。 4. 表示"每当;每次",相当于every time或whenever。例如: She always turns to us for help when she is in trouble.每当她遇到困难,她总是向我们求助。It is freezing cold here when it snows. 每当这儿下雪,天气就十分寒冷。 5. 表示"当……之后;在……以后",相当于after the time that。例如: We went home when the film was over. 电影结束以后,我们回家去了。When she got home, she started to prepare supper. 她回到家后,开始准备晚饭。 二、引导条件状语从句 when引导的条件状语从句相当于if/ in case引导的条件状语从句.例如: When there is no gravity, our feet can no longer stay on the ground. 如果没有重力,我们的脚就不能够在地面上站稳。Turn off the switch when anything goes wrong with the machine. 如果机器发生故障,就把电闸关上。 三、引导原因状语从句when引导原因状语从句时,相当于since/now that引导的原因状语从句。例如: How can they learn anything when they spend all their spare time watching television? 他们把所有的空闲时间都用来看电视了,还能学到什么东西呢? Why do you want a new job when you have got such a good one? 既然你已经有了这么好的一份工作,为什么还要再找新的工作呢? 四、引导让步状语从句when引导的让步状语从句相当于though或although引导的让步状语从句。例如: He usually walks when he might ride. 虽然有车可乘,但他通常是步行。 The little girl can tell right from wrong when she is only twelve. 这个小女孩虽然只有十二岁,却能分清是非。 五、引导定语从句when引导定语从句时,有时可用in which或on which来替代。例如:We'll put off the picnic until next week, when the weather may be better. 我们要把野餐推迟到下周,那时可能天气好些。 I'll never forget the day when I joined the Party. 我将永远不会忘记我入党的那一天。 六、引导名词性从句 1. 引导宾语从句。例如: Please tell us when his father will return from abroad. 请告诉我们他父亲什么时候从国外回来。 2. 引导主语从句。例如: When they will leave for Australia hasn't been decided. 他们什么时候动身去澳大利亚还没有决定。 3. 引导表语从句。例如: The question is when they will get so much money to set up the factory. 问题是他们将在什么时候弄到这么多钱来把这个工厂办起来。 when, while 和as 引导时间状语从句的用法 这三个词的意思很简单，都有“当……时候”的意思。但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。别说是学生，就我个人而言，做这样的选择题要保证百分之百的正确也是不可能的。现根据大量的实例和个人的思考，做一点小结，供大家参考。 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. 他小时候就常常试验一些新的设想。 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。

When,While,As引导时间状语从句的区别

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。 一、when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。 ① Why do you want a new job when you’ve got such a good one already？（get为短暂性动词）你已经找到如此好的工作，为何还想再找新的？ ②Sorry，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。 ③Strike while the iron is hot．（is为延续性动词，表示一种持续的状态）趁热打铁。 ④ The students took notes as they listened．（listen为延续性动词）学生们边听课边做笔记。 二、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。 1．从句动作在主句动作前发生，只用 when。 ①When 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。 ②When 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。 2．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 phone call，I was writing a letter．（make为延续性动词）当她在打电话时，我正在写信。 3．当主句、从句动作同时进行，从句动作的时间概念淡化，而主要表示主句动作发生的背景或条件时，只能用 as。这时，as常表示“随着……”；“一边……，一边……”之意。 ① As the time went on，the weather got worse．（as表示“随着……”之意） ② The atmosphere gets thinner and thinner as the height increases．随着高度的增加，大气越来越稀薄。 ③As years go by，China is getting stronger and richer．随着时间一年一年过去，中国变得越来越富强了。 ④The little girls sang as they went．小姑娘们一边走，一边唱。 ⑤The sad mother sat on the roadside，shouting as she was crying．伤心的妈妈坐在路边，边哭边叫。 4．在将来时从句中，常用when，且从句须用一般时代替将来时。 ①You shall borrow the book when I have finished reading it．在我读完这本书后，你可以借阅。 ②When the manager comes here for a visit next week，Ill talk with him about this．下周，经理来这参观时，我会和他谈谈此事。 三、when用于表示“一……就……”的句型中（指过去的事情）。

2019高考英语状语从句when,as,while的区别素材

when,as,while的区别 when,as,while的区别 1.He fell asleep when [while, as] he was reading. 他看书时睡着了。 2.While you’re there, can you get me some stamps? 3.I kept silent while he was writing. 在他写的时候，我默不作声。 4.She sang as she went along. 她边走边唱。 5.It was raining hard when [as] we arrived. 我们到达时正下着大雨。 6.I thought of it just when [as] you opened your mouth. 就在你要说的时候， 我也想到了。 7.Things are getting better and better as time goes on. 随着时间的推移， 情况越来越好。 8.As it grew darker, it became colder. 天色越晚，天气越冷。 9.He smiles when you praise him. 你夸奖他时他总是笑笑。 10.I will go home when he comes back. 他回来时，我就回家去。 11.We were about to start when it began to rain. 我们正要出发，这时天开始 下雨了。 12.He likes coffee, while she likes tea. 他喜欢咖啡，而她却喜欢茶。 13.As [When] a boy, he lived in Japan. 他小时候在日本。 14.When [While] in trouble, ask her for help. 遇到麻烦的时候你就去找她帮 忙。 【归纳】 1.若主句表示的是一个短暂性动作，从句表示的是一个持续性动作，三者都可用： 2.as 用于引出一个持续性动词表示“在……期间”时，其谓语通常只能是那些含有 动作(action)和发展(development) 意味的动词，一般不能是那些不用于进行时态 的动词(如be, seem, love, want, agree, see, know, have 等)，所以句中的while 不能换为as. 3.若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所 指的整个时间，通常要用while： 4.若主从句表示的两个同时进行的动作含有“一边…一边”之意思，通常用as： 5.若从句是一个短暂性动作，主句是一个持续性动作，可用as / when 但不用while： 6.若主从句表示的是两个同时(或几乎同时)发生的短暂性动作，用as / when： 7.(7.8句)若要表示两个正在发展变化的情况，相当于汉语的“随着”，一般用as： 8.表示“每当…的时候”(暗示一种规律性)，一般要用when： 9.若主从句所表示的动作不是同时发生，而是有先后顺序时，一般要用when：

When 引导时间状语从句

When 引导时间状语从句 1.When you visit a foreign country, it is important to know how to ask for help politely. 当你去参观一个外国国家的时候，知道如何礼貌的寻求帮助那是很重要的。 2.When the teacher came in, we were talking. 当老师走进来，我们正在谈论 3.When I got to the airport, the guests had left. 我到达机场时，客人们都已经离开了。 entire adj. 全部的，整个的 例：The entire village was destroyed.整个村庄都被毁坏了。 I wasted an entire day on it. 我在这上面耗费了一整天。 entirely adv. 全部地，完整地 例I entirely agree with you.我完全赞成你。 I am not entirely happy about the proposal.我并不完全对这个提议感到满意。 The audience was almost entirely female.观众几乎全都是女性。 lead v led-led 带路，领路

The receptionist led the way to the boardroom 相通The wire led to a speaker 通向，通往Which door leads to the yard? lead to sth导致Eating too much sugar can lead to health problems. lead sb (to sth)使得出，引导 What led you to this conclusion? 过某种生活 He lead a quiet life. curious 英['kj??r??s] adj 好奇的，有求知欲的；古怪的；爱挑剔的They were very curious about the people who lived upstairs. There was a curious mixture of people in audience. beaten英['bi:t(?)n] ?adj. 被打败了的；筋疲力竭的；踏平的 ?v. 打败（beat的过去分词） beaten track 常规；惯例；踏出来的路,踏平的路 off the beaten track 鲜有人涉足地; 独辟蹊径; 偏僻地; 不走寻常路 follow the beaten track 因循守旧 例：I want to do something off the beaten track.

状语从句中的when,while ,as用法汇总

状语从句中的when, while和as的用法 一．when，while，as在时间状语从句中的区别： ①三者均可表示“当……的时候”，如果主句表示的是短暂的动作，而从句表示的是一段时间，三者可通用。如： I met Kang Li as／when／while I was walking along the street． 当我沿街散步时碰见了康丽。 ②when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。如： It was snowing when we got to the airport．当我们到达机场时，天正下着雪。 （不能用while） ③as强调主句与从句表示的动作同时发生，as常表示“随着……”；“一边……， 一边……；while强调主句表示的动作持续于while所指的整个时间内；when 可指主、从句所述动作同时或先后发生。如： As the time went on，the weather got worse．（as表示“随着……”之意） He sang as he went along．他边走边唱。 Please write while I read．我读的时候，请写下来。 When he reached home，he had a little rest．回到家后，他休息了一会儿。 ④when用于表示“一……就……”的句型中（指过去的事情）。 somebody had hardly（＝scarcely）done …when．．． ＝Hardly ／Scarcely had somebody done …when．．． ①I had hardly ／scarcely closed my eyes when someone knocked at the door． ＝Hardly ／Scarcely had I closed my eyes when someone knocked at the door．我刚一闭上眼，就有人在敲门了。 二.when, while和as都可引导让步状语从句： ①when引导让步状语从句，意为“尽管，虽然”相当于though或although: They stopped trying when they might have succeeded next time. ②while引导让步状语从句，相当于although ，是较为正式的书面语: While I am willing to go, I would like it better that you went. ③as引导让步状语从句必须倒装，从句中的表语，状语或动词原形置于句首，若表语为名词，前置时省略冠词。 Child as he is, he knows a lot. Much as I like it, I will not buy it, for it’s too expensive.

when引导的时间状语从句

说到when引导的时间状语从句，不得不提起as和while when, while 和as 引导时间状语从句的用法 这三个词的意思很简单，都有“当……时候”的意思。但学生经常会问三个词的区别在哪儿，特别是在做选择题的时候。 when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。 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。 Why do you want a new job when you’ve got such a good one already？（get为短暂性动词）你已经找到如此好的工作，为何还想再找新的？ The students took notes as they listened．（listen为延续性动词）学生们边听课边做笔记。 一、如果只从现象来看，when 从句用的最多的是一般过去时，而主句用过去的某种时态 When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。Were you writing when the teacher came in? 老师进来的时候，你在写信吗？ Sorry, I was out when you called me. 对不起，你打电话来的时候我出去了。 He was on the point of leaving when someone knocked at the door. 他正要走，这时有人敲门。 I thought of it just when you opened your mouth. 就在你要说话的时候，我也想到了。 I had hardly[scarcely] closed my eyes when someone knocked at the door. 注意when时间从句使用其他时态的情况，考试中的常考点： 1、表示客观真理时，主从句用一般现在时。这主要体现在含有when的从句 如：The water turns into ice when it is under zero degree centigrade. 在零度以下，水结成冰。 2、表示将有发生的动作，主句用一般将来时，从句用一般现在时表示将来。 如：I will tell you as soon as he comes back. 他一回来我就会告诉你。 You shall borrow the book when I have finished reading it. 在我读完这本书后，你可以借阅。When the manager comes here for a visit next week, I’ll talk with him about this. 下周，经理来这参观时，我会和他谈谈此事。 I will call you as soon as i arrive. 3、表示过去发生的动作，而两个动作是表示递进关系，即两动作没有太明显是先后发生的，主从句用一般过去时：如： When he arrived home, he took out the key and opened the door. 当他到家后，他拿出钥匙开门。 4、表示过去发生的动作，两动作明显的先后发生的，则，最先发生的用过去完成时，表示过去的过去。后发生的用一般过去时。 如：I had had dinner when my father came back. 我爸爸回来时，我已吃过晚饭了。 When I got to the airport, the guests had left. 当我赶到飞机场时，客人们已经离开了。 When he had finished his homework, he took a short rest.当他完成作业后，他休息了一会儿。 5、表示过去发生的动作，其中一个动作是现在发生，则一句用一般过去时，另一句要用过去进行时。（主从句都可用这两种时态） 如：I was watching TV when my mother came back. 我妈妈回来时，我现在看电视。 The telephone rang when we were having lunch. 当我们在吃午餐时，电话铃响了。