8B过去进行时when,as和while的区别

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八年级英语while,when,as的区分

八年级英语while,when,as的区分

while, when ,as一般同时加以区分方法如下:1) 如主句谓语动词表示的是短暂动作,从句时间状语指一段时间,三者可通用。

例如:Peter came in while /as /when I was watching TV.当Peter进来的时候我正在看电视。

I was watching TV when Peter came in.当Peter进来时我正在看电视。

2) as 和when 可与非延续性动词连用,而while 只能与延续性动词连用。

例如:He came in when/ as I was going to bed.我正要上床睡觉,他进来了。

3) as 和while可用来指一段时间,但as 强调主句与从句表示的动作同时发生,while强调主句表示的动作是在while 从句的动作延续中发生。

例如: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。

I came in while he was reading an interesting book in his room.我进来的时候他正在房间里看一本有趣的书。

3)如果从句和主句要表示一个人的两个动作交替进行或同时完成时,则多用as,可译为“一边......,一边......”。

例如:He looked behind from to time as he went.他一边走,一边不时地往后看。

As time goes on, it’s getting warmer and warmer..随着时间的推移,天气变得越来越暖了。

I thought of it just as you opened your mouth.你一张嘴我就知道你要说什么。

(若表示两个短促动作几乎同时发生时,用as的场合多于when.)4)当主从句之间表示转折或对比关系时,多用while, 不用as或when。

英语语法知识点详解When While As的区别

英语语法知识点详解When While As的区别

英语语法知识点详解When While As的区别AS, WHEN and WHILE are conjunctions. When introducing an adverbial clause of time, AS, WHEN and WHILE can mean the same, but they can also have slightly different meanings.AS, WHEN, WHILE是连词。

AS, WHEN, WHILE在引导时间状语从句时,既有共性,也有不同。

AS:◆We can use AS to introduce two events happening at the same time. After AS, we can use a simple or continuous form of the verb.◆AS用来引导两件同时发生的事件,AS从句的动词可用简单时态或进行时态。

★ As I was at home, the postman came.★我在家的时候,邮递员来了。

★As she walked to the door, she thanked them for a lovely dinner.★在她走到门口的时候,她感谢他们提供的美味晚餐。

★As they were signing the contract, they noticed that a page was missing.★在签署合同的时候,他们发现少了一页。

★We were lying on the beach sunbathing as they were playing volleyball.★我们躺在沙滩上晒日光浴时,他们在打排球。

★As I was walking out of the coffee shop, I drop the cup.★正当我走出咖啡店时,杯子掉了。

“当(在)……时候”aswhenwhile的区别,你有更好办法吗?

“当(在)……时候”aswhenwhile的区别,你有更好办法吗?

“当(在)……时候”aswhenwhile的区别,你有更好办法吗?这三个词都可以用作连词,表时间关系,常常可以互换,但又有区别:1. while“当(在)……的时候”表主句的动作或事情发生在从句中的动作或事情的进展过程之中;简单地说,就是同时发生!while从句里谓语动词必须是延续性动词,不能是短暂性动词。

从句常为进行时态。

He slept while/when I cooked supper. 我烧晚饭时,他睡觉。

You can do the dishes while/when she cooks dinner. 她烧饭时你可以洗洗碗。

While/When she was in Australia, she met a rich businessman and fell in love with him.在澳大利亚时,她遇到了个富商并坠入爱河。

Please don't talk so loud while others are working. 别人在工作的时候,请勿大声讲话。

注:(从句是进行时,多用while,也有人用when)Cathy broke her arm while she was playing in the garden.凯茜在花园里玩的时候摔伤了胳膊。

While they were having a nap, somebody broke into the house.他们在午睡时,有人闯进他们家。

While he was watching TV, I was working. 他看电视的时候,我在工作。

注:(主句从句都是进行时,一般只用while,不用when,尤其是考试时)2. when“当(在)……的时候”主句和从句的动作或事情可以同时发生,也可以先后发生。

when从句里谓语动词必可以是延续性动词,也可以是短暂性动词。

I was having a bath when the telephone rang.电话铃响的时候我正在洗澡。

when,while和as有什么区别

when,while和as有什么区别

when,while和as有什么区别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。

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)。

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。

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。

when从句的事件,相当于另一个事件发生的时间点。

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。

总之从句也可以有其它的时态,但几乎也不用进行时。

while的用法若主、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。

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。

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。

as的用法若主、从句表示的是两件事情同时(或几乎同时)发生的短暂性动作,一般要用as(也可用when)。

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。

when,while和as的区别1.根据从句动作的持续性来区分若是“主短从长”型,即主句是一个短暂性的动作,而从句是一个持续性动作,此时三者都可用。

8B过去进行时when,as和while的区别.

8B过去进行时when,as和while的区别.

• 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。
while连接的句子,后面必须用进行时(现在/ 过去进行时) 1) A car hit her while she was thinking about a question. 2) The books fell off from the shelf while they were listening to the radio. 3) While we are playing football, a noise comes from downstairs.
• 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。

whilewhenas的用法和区别

whilewhenas的用法和区别

while、when、as的用法和区别1.引言在英语中,有很多连词可以用来引导从句,w hi le、w he n和as就是其中常见的几个。

这些连词在使用上有一些相似之处,但又有一些区别。

本文将详细介绍w hil e、w he n和as的用法和区别,帮助读者正确使用这些连词。

2. wh ile的用法和意义w h i l e是一个常用的连词,用来引导表示两个或多个同时发生的动作或状态的从句。

它可以表示时间上的同时性,也可以表示对比或对立关系。

例如:w h i l e-I wa s st ud yin g my si st er wa sw atc h in gT V.(我在学习,而我妹妹在看电视。

)W h i l e-I li k ec of fee,my br ot he rp re fer s te a.(虽然我喜欢咖啡,但我哥哥更喜欢茶。

)需要注意的是,w hil e引导的从句通常使用进行时态表示正在进行的动作。

3. wh en的用法和意义w h e n是另一个常见的连词,用来引导表示时间或条件的从句。

它可以表示具体的时间点或事件发生的条件。

例如:w h e n-Iw il lg ot ot he p ar ty If in is hm ywo r k.(我完成工作后,会去参加派对。

)W h e n-it ra in s,Il ik e to st ay at ho me and r ea d.(下雨时,我喜欢待在家里读书。

)与w hi le不同的是,w he n引导的从句通常使用一般时态表示一般性的情况。

4. a s的用法和意义a s是一个多功能的连词,它可以表示时间、原因、方式等多种含义。

具体用法如下:-表示时间:当某个动作在另一个动作发生时进行。

例如:A s-Iw as wa lk in gd ow n th es tr ee t,Is awa n ol df ri en d.(当我走在街上时,我碰见了一个老朋友。

初中英语知识点 when, while, as的用法区别

初中英语知识点 when, while, as的用法区别

初中英语知识点 when, while, as的用法区别三者可表示“当……的时候”,区别如下:He fell asleep when [while, as] he was reading. 他看书时睡着了。

【注】as 用于引出一个持续性动词表示在期间时,其谓语通常不能是那些不用于进展时态的动词(如 be, seem, love, want, agree, see, know, have 等),所以下面一句中的 while 不能换为as:A:Im going to the post office. 我要去邮局。

B:While youre there, can you get me some stamps? 当你在邮局时,能帮我买几张邮票吗?I kept silent while he was writing. 在他写的时候,我默不作声。

但是,假设主从句表示的两个同时进展的动作含有一边一边之意思,通常用 as:She sang as she went along. 她边走边唱。

It was raining hard when [as] we arrived. 我们到达时正下着大雨。

I thought of it just when [as] you opened your mouth. 就在你要说的时候,我也想到了。

Things are getting better and better as time goes on. 随着时间的推移,情况越来越好。

As it grew darker, it became colder. 天色越晚,天气越冷。

Its cold when it snows. 下雪时天冷。

He smiles when you praise him. 你夸奖他时他总是笑笑。

I will go home when he es back. 他回来时,我就回家去。

We were about to start when it began to rain. 我们正要出发,这时天开始下雨了。

第七 when while as 区别及练习

第七  when while as 区别及练习

When while as区别一、根据从句动作的持续性来区分1、“主短从长”型:即主句是一个短暂性动作,而从句是一个持续性动作,此时三者都可用。

如:Jim hurt his arm while[when, as] he was playing tennis. 吉姆打网球时把手臂扭伤了。

2、“主长从长”型:即主句和从句为两个同时进行的动作或存在的状态,且强调主句动作或状态延续到从句所指的整个时间,此时通常要用while。

I always listen to the radio while I’m driving. 我总是一边开车一边听收音机。

He didn’t ask me in; he kept me standing at the door while he read the message. 他没有让我进去,他只顾看那张条子,让我站在门口等着。

但是,若主句和从句所表示的两个同时进行的动作含有“一边……一边”之意时,则习惯上要用as。

如:He swung his arms as he walked. 他走路时摆动着手臂。

3、“主长从短”型:即主句是一个持续性动作,而从句是一个短暂性动作,此时可以用as 或when,但不能用while。

如:It was raining hard when [as] we arrived. 我们到达时正下着大雨。

二、根据主句与从句动作是否同时发生来区分1、若主句与从句表示的是两个同时发生的短暂性动作,含有类似汉语“一……就”的意思,英语一般要用as (也可用when)。

如:The ice cracked as [when] I stepped onto it. 我一踩冰就裂了。

2、若主句与从句表示的是两个几乎同时发生的短暂性动作,含有类似汉语“刚要……就”“正要……却”的意思,英语一般要用as(也可用when),且此时通常连用副词just。

如:I caught him just when [as] he was leaving the building. 他正要离开大楼的时候,我把他截住了。

when、while和as 的区别

when、while和as 的区别

While ,when,as的用法1、这三个词都有“当…时候”的意思There were fewer sandstorms when my grandparents were youngWhile Millie was watching TV,her mum was sleepingI saw a traffic accident as I was riding to school this morning2、when和as既可以指某一点时间,也可以指某一段时间,其从句谓语动词表示的动作既可以是瞬间性的,也可以是延续性的;while 指一段时间,从句中的谓语动词必须是延续性的。

即:指一段时间时,when、while 和as 都可用;指一点时间时,只能用when或as,不能用while。

比较:When/As he woke up,it was 8 o’clock (T)While he woke up,it was 8 o’clock (F)When/While/As I was waiting for a bus,I met her (T)1、when引导的从句的谓语动词可以在主语谓语动作之前、之后或同时发生;while 和as 引导的从句的谓语动作必须是和主语谓语动作同时发生when he finished his homework,he played the computer games for a while(finished 先发生)when I got to the museum ,the door was closed(got to 后发生)while/As I was sleeping,the telephone rang(was sleeping和rang 同时发生)2、当主句、从句动作同时发生且从句作为延续性动词时,when、while和as 都可使用When /While /As she was making a phone call,I was writing an email(make 为延续性动词)When /While /As we were reading,a stranger came in(read 为延续性动词)3、强调两个动作同时进行,常用“过去进行时+while+过去进行时”的结构,如:They were rowing boats while we were climbing the hill4、强调某个动作发生的时候,另一个动作正在进行,常用“一般过去时+while+过去进行时”的结构,如:It began to rain heavily while we were having dinner5、强调某个动作正在进行时,另一个动作突然发生,常用“过去进行时+when+一般过去时”:I was walking in the street when he called me6、当主句、从句动词同时进行,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,这是,as 有“随着….”,”一边…,一边….”之意As years go by,China is getting richer and strongerThe little girls sang as they played。

when--while--as-的区别

when--while--as-的区别

when, while, as 的区别[说明]作连词时,when,while和as都有“当……时候”的意义,引导时间状语从句,但应注意它们的区别。

1) 如主句谓语动词表示的是短暂动作,从句时间状语指一段时间,三者可通用。

例如:Peter came in while /as I was watching TV.当Peter进来的时候我正在看电视。

I was watching TV when Peter came in.当Peter进来时我正在看电视。

2) as 和when 可与非延续性动词连用,而while 只能与延续性动词连用。

例如:He came in when/ as I was going to bed.我正要上床睡觉,他进来了。

3) as 和while可用来指一段时间,但as 强调主句与从句表示的动作同时发生,while强调主句表示的动作是在while 从句的动作延续中发生。

例如: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。

I came in while he was reading an interesting book in his room.我进来的时候他正在房间里看一本有趣的书。

三者都有“当……时候”的意思,注意以下用法与区别:1、若主句表示的是一个短暂性的动作,而从句表示的是一个持续性动作时,三者都可用。

如:He fell asleep when [while, as] he was reading. 他看书时睡着了。

I met him when [as, while] I was taking a walk in the park. 我在公园散步时遇到了他。

注: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),所以下面一句中的while 不能换为as:A:I’m going to the post office. 我要去邮局。

whilewhen和as的用法区别

whilewhen和as的用法区别

w h i l e w h e n和a s的用法区别Newly compiled on November 23, 2020as when while 的区别和用法as when while的用法一、 as的意思是“正当……时候”,它既可表示一个具体的时间点,也可以表示一段时间。

as可表示主句和从句的动作同时发生或同时持续,即“点点重合”“线线重合”;又可表示一个动作发生在另一个动作的持续过程中,即“点线重合”,但不能表示两个动作一前一后发生。

如果主句和从句的谓语动词都表示持续性的动作,二者均可用进行时,也可以一个用进行时,一个用一般时或者都用一般时。

1、As I got on the bus, he got off. 我上车,他下车。

(点点重合)两个动作都是非延续性的2、 He was writing as I was reading. 我看书时,他在写字。

(线线重合)两个动作都是延续性的3、 The students were talking as the teacher came in. 老师进来时,学生们正在讲话。

(点线重合)前一个动作是延续性的,而后一个动作时非延续性的二、while的意思是“在……同时(at the same time that )”“在……期间(for as long as, during the time that)”。

从while的本身词义来看,它只能表示一段时间,不能表示具体的时间点。

在时间上可以是“线线重合”或“点线重合”,但不能表示“点点重合”。

例如:1、He was watching TV while she was cooking. 她做饭时,他在看电视。

(线线重合)2、 He was waiting for me while I was working. 我工作的时候,他正等着我。

(线线重合)3、 He asked me a question while I was speaking. 我在讲话时,他问了我一个问题。

(完整版)while、when和as的用法区别

(完整版)while、when和as的用法区别

(完整版)while、when和as的用法区别as when while 的区别和用法as when while的用法它既可表示一个具体的时间点,也可以表一、as的意思是“正当……时候”,线示一段时间。

as可表示主句和从句的动作同时发生或同时持续,即“点点重合”“线重合”;又可表示一个动作发生在另一个动作的持续过程中,即“点线重合”,但不能表示两个动作一前一后发生。

如果主句和从句的谓语动词都表示持续性的动作,二者均可用进行时,也可以一个用进行时,一个用一般时或者都用一般时。

1、As I got on the bus,he got off. 我上车,他下车。

(点点重合)两个动作都是非延续性的2、He was writing as I was reading. 我看书时,他在写字。

(线线重合)两个动作都是延续性的3、The students were talking as the teacher came in. 老师进来时,学生们正在讲话。

(点线重合)前一个动作是延续性的,而后一个动作时非延续性的在……期间(for二、while的意思是“在……同时(at the same time that )”“as long as, during the time that)”。

从while的本身词义来看,它只能表示一段时间,不能表示具体的时间点。

在时间上可以是“线线重合”或“点线重合”,但不能表示“点点重合”。

例如:1、He was watching TV while she was cooking. 她做饭时,他在看电视。

(线线重合)2、He was waiting for me while I was working. 我工作的时候,他正等着我。

(线线重合)3、He asked me a question while I was speaking. 我在讲话时,他问了我一个问题。

(点线重合)三、when的意思是“当……时候(at the time that)”“无论什么时候在……以后(after)”。

as-when和while的区别PPT课件

as-when和while的区别PPT课件
stamps?
A. As B. when C. while D. If
6
A. though B. as C. while D. For
3. (2007重庆) ___D___ ,his idea was accepted by
all the people at the meeting.
A. Strange as might it sound B. As it might sound strange C. As strange it might sound D. Strange as it mi____I really don’t like art, I find
his work impressive. A. As B. Since C. If D. While
2. (2007四川)I’d like to study law at university
____C____my cousin prefers geography.
1
②when 说明从句的动作和主句的动作可以是同时, 也可以是先后发生;
as,while 则是同时发生。
When /While /As she was making a phone call, I was writing a letter.
Strike the iron while it is hot.
When,as和while的区别
①when/as是at or during the time that, 既指时间点, 也可指一段时间;
• while是during the time that,只指一段时间。 • when/as引导的时间状语从句中的动词可以是终止性
动词,也可以是延续性动词, 而while从句中的动词必须是延续性动词。 Sorry, I was out when(as) you called me. He can write only when(as/while) the baby is asleep

aswhilewhen的区别

aswhilewhen的区别

aswhilewhen的区别1.主句是一个短暂性的动作,而从句是一个持续性动作,此时三者都可用。

2.主句和从句为两个同时进行的动作或存在的状态,且强调主句动作或状态延续到从句所指的整个时间,此时通常要用while。

但是,含有一边……一边之意时,则习惯上要用as。

3.主句是一个持续性动作,而从句是一个短暂性动作,此时可以用as或when,但不能用while。

as,when和while的区别1. As/When/While:A was happening, B happened或B happened as/when/while A was happening.as,when,while用来表示“当某事发生的时候,一个长的行为或事件正在进行”。

当从句引导的句子表示持续性动作时,as/when/while引导的从句一般用过去进行时(was/were+动词ing)。

例如:As I was walking down the street I saw Joe driving a Porsche.当我正在沿着街道走的时候,我看到乔正开着保时捷。

The telephone rang when i was having a bath 当我正在洗澡的时候,电话铃响了。

as,when,while都可以用现在时态,如:Please don't interrupt me when I'm speaking.当我说话的时候,请不要打断I often get good ideas while I'm shaving.当我刮胡子的时候,我经常能想到好点子。

2. while A was happening,B was happening或While A happened, B happenedwhile用来表示两个长动作或事件过去同时发生,用过去进行时或者过去时态。

如:While you were reading the paper ,I was working.当你在读报纸的时候,我正在工作。

when while as的区别和用法

when while as的区别和用法

when while as的区别和用法很多人在英语学习中可能会被when,while,as三个常见的连接词混淆。

很多时候,它们有着相近甚至完全相同的意思,但也有时候它们有着截然不同的用法。

本文将会讨论when, while, as连词的区别和用法。

首先,when表示时间。

它可以指发生在过去、现在或将来的时间,用来引导时间状语从句。

例如:When I was young, I dreamed of becoming a doctor.同样,when也可以表示在某种情境或条件下的意思,用来引导条件状语从句。

例如:I will be happy when I find a job.其次,while表示时间长短上的一个对比,引导从句表示两个动作同时发生,但是短暂的动作可能未完成;可以用来表示一段时间里一直持续发生的事情,也可以引导时间条件状语从句。

例如: I got up while it was still dark.While I was out, my brother cleaned the room.最后,as是一个多义的介词,主要用于表示时间的关系,引导时间状语从句,在从句中,它可以指真正的时间,也可以作为一个介词,表示时间的比较,表示主句的行为和从句的行为一起发生,但从句发生的比较早,例如:She was still crying as I left the room.As the sun set, I headed home.总结起来,when表示时间;while表示长短对比;as表示时间比较;前者两者可以引导时间状语从句和条件状语从句,但有时会有些小差别。

以上就是when, while, as三个常见连接词的区别和用法。

如果你在英语学习中遇到困难,请不要灰心,要记住学习英语无他,只有下苦功。

久而久之,你一定会掌握它们的用法。

when while as 的区别

when while as 的区别

When while 与as 的区别While 意为“在·····期间”相当于during the time that ,只能表示时间段,不能表达时间点,从句的动词只能是持续性动词。

While为主句的动词划定一个时间范围。

While we were playing ,the school bus came up.当我们正在玩时,校车来了。

Bob is reading while his mother is cooking .妈妈在煮饭时,Bob在看书。

While we were swimming in the river ,we saw a fish jump out of the river.当我们在河里游泳时,我们看见一条鱼跳出了水面。

2.when 意为“在······时候,就在此时“相当于at that time,多只时间点,when 为主句动作的发生规定了一个特定的时间,主句和从句的动作可同时,也可有先后。

They were playing football, when I got there.当我到达那里时,他们正在踢足球。

His wife was cooking when he returned from work .他上班回来时,妻子在煮饭。

I was walking along the street when a traffic accident happened.交通事故发生时,我正在街上行走。

唱歌一边跳舞。

As the time went on ,the situation got worse and woese.3 .as 意为“正当······;与······同时”相当于“at the same time”只时间点和时间段,从句动词可是延续性,也可非延续性。

whenwhileas区别和用法

whenwhileas区别和用法

whenwhileas区别和用法
When、while和as这三个单词在英语中都表示时间的概念,但
是它们的用法和含义却有所不同。

When和while都可以表示“当……的时候”,但是它们的用法有区别。

When通常用于表示一个短暂的动作或事件,强调时间上的先
后顺序,如:When I arrived at the airport, the plane had already taken off.(当我到达机场时,飞机已经起飞了。

)While则通常用
于表示一个持续性的状态或动作,强调的是同一时间内两个事情的共存,如:I watched TV while eating dinner.(我边吃晚饭边看电视。


As则通常表示“当做……的时候”、“由于”、“和……同时”,如:As a teacher, I have to set a good example for my students.(作为一名教师,我必须为学生树立一个好榜样。

)As I was walking to work, I saw my neighbor.(当我走路去上班的时候,我看到了
我的邻居。


除了以上基本含义之外,这三个单词还有一些特定的用法和搭配,需要根据具体语境来理解。

总之,在使用这三个单词时,需要注意它们的含义和用法的差异,以便正确地表达自己的意思。

- 1 -。

while when as的用法和区别

while when as的用法和区别

while when as的用法和区别1. 嘿,你知道吗,while 这个词啊,就像是个慢性子,总是慢悠悠地表达着“在……期间”。

比如“While I was cooking, the phone rang.”(当我在做饭时,电话响了。

)它就这么不慌不忙地表示一个持续的动作呢!2. 再来说说 when 呀,它有时候就像个急性子,总是突然冒出来说“当……时候”。

像“She started crying when she heard the news.”(当她听到这个消息时,她开始哭了。

),多么直接呀!3. 哇哦,as 可有意思啦,它就如同一个巧妙的连接者,表达“随着”“当……时”。

比如说“As the time passed, I became more and more tired.”(随着时间流逝,我变得越来越累。

)是不是很形象呢?4. 你想啊,while 就像一场漫长的等待,不是么?“While he waited for the bus, he read a book.”(在他等公交车时,他读了一本书。

),等啊等。

5. when 不就像是个瞬间的信号吗?“When I saw him, I was surprised.”(当我看见他时,我很惊讶。

),一下子就出现啦!6. 嘿呀,as 就好像是个温柔的陪伴者呢!“As she grew older, she became wiser.”(随着她年龄增长,她变得更聪明了。

)一直跟着呢。

7. 想想看,while 引导的句子是不是常常感觉时间在慢慢流淌呀?就像“While I was studying, time flew by.”(当我在学习时,时间飞逝。

)8. when 总是能精准地指出那个特别的时刻,对吧?“When the concert ended, everyone clapped.”(当音乐会结束时,大家都鼓掌。

)9. as 能让我们感觉到事情在同步进行呢,像“As he was singing, we were dancing.”(当他在唱歌时,我们在跳舞。

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指紧接着发生的两个短动作,主从句都用一 般过去时 1)He took out his English books as soon as he sat down 2) We ate a lot as soon as we got home. 3) As soon as she came out of the house, she wore a big hat. 小结:看as soon as 的时态,要么两边都是 过去时,要么就是主将从现
• ③由when引导的时间状语从句,主句用过去进行时,从 句应用一般过去时;如果从句和主句的动作同时发生,两 句都用过去进行时的时候,多用while引导,如: • a. When the teacher came in, we were talking. • 当此句改变主从句的位置时,则为: • While we were talking, the teacher came in. • b. They were singing while we were dancing. • ④when和while 还可作并列连词。when表示“在那时”; while表示“而,却”,表对照关系。如: • a. The children were running to move the bag of rice when they heard the sound of a motor bike. • 孩子们正要跑过去搬开那袋米,这时他们听到了摩托车的 声音。 • b. He is strong while his brother is weak. • 他长得很结实,而他弟弟却很瘦弱。

• 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。
• 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,I’ll talk with him about this.下周,经理来这参观时,我会和他谈谈此 事。
when 和while 的区别
1. When的用法比较活, 用在状语从句中, 两边的时态可以相等. 1) He was singing when I was reading. 2) Father is cooking when Tom is sleeping. 3) Please say hello to Mike when you see him.
as soon as 的用法
• as soon as连接的时间状语从句中,指未发 生的动作,规律是:主句一般将来时,从句 用一般现在时代替一般将来时 (主将从现) • I will tell him the news as soon as he comes back。 • They will be crazy as soon as they hear the news • As soon as he gets home, he will notice you.
• as, when, while都表示主、从句的动作或状态同时发生,但三者意 义不尽相同。as和when引导的从句既可表示一点时间,也可表示一段 时间,从句中的谓语动词既可以是持续性动词,也可以为短暂性动词, 经常可以互换使用;while引导的从句通常表示一段时间,从句中宜 用持续性动词作谓语。当从句中的谓语动词为持续性动词时,这三者 可以通用(前面例句中已有体现),再如: • • Mother was worried because little Alice was ill, especially as / when / while father was away in France.妈妈担心,因为小 艾丽思病了,特别是当父亲远在法国的时候。
while连接的句子,后面必须用进行时(现在/ 过去进行时) 1) A car hit her while she was thinking about a question. 2) The books fell off from the shelf while they were listening to the radio. 3) While we are playing football, a noise comes from downstairs.
• 当主从句之间表示转折或对比关系时,多用while, 不用 as或when。如: • She thought I was talking about her daughter, while in fact, I was talking about my daughter.她 以为我在谈论她女儿,而事实上,我在谈论我的女儿。 • 如果表示从句的动作在主句的动作“之前”或“之后”发 生时,多用when(=after), 不用as或 while。此外, when还含有“at that moment”的意思(= and then), 引起的句子不能放在句首,也不能用as, while来替换。 例如: • He was about to leave when the telephone rang.他正 要离开,忽然电话铃响了。 • We were watching TV when suddenly the lights went out.我们正在看电视,突然灯灭了。 • They had just arrived home when it began to rain. 他们刚到家,天就开始下雨了。
when和while的区别
• ①when是at or during the time that, 既指时 间点,也可指一段时间; • while是during the time that,只指一段时间, 因此when引导的时间状语从句中的动词可以是终 止性动词,也可以是延续性动词,而while从句中 的动词必须是延续性动词。 • ②when 说明从句的动作和主句的动作可以是同时, 也可以是先后发生;while 则强调主句的动作在 从句动作的发生的过程中或主从句两个动作同时 发生。
when两边的时态也可以不等 1) Kate was swimming when her parents came back. 2) They were trying to run away when the policeman broke into the house. 3) The light went off when they were talking.
2) We could come to see the film yesterday while Tom lost the tickets.
用while 和when填空
when 1)He was copying a text _______ his brother came in. when 2) Mary learnt a lot ______ she was only 7. While/when 3) __________ I was drinking, father came in. while/when 4) They bought many food __________ Mike was studying. While/when 5) __________ the thief was stealing the DVD, a lot of people came in. 6) ______ he fell down, he came up with an When idea.
小结:用while 和when 填空,看看它们后面的句 子的时态。如果是过去时,必须用when. 如果是进 行时,必须用while(没有while选项的时候用 when)
小结:在作“当…时候”时,when可以替换 while. 1) Mary was happy while/when she was doing her homework. 2) When/while they are watering flowers, a stranger shout at them. While 还有 “然而”的意思。此时不能用 when 代替。 1) He has a good chance to be the famous player while he wasted it.
• 如果从句和主句要表示一个人的两个动作交替进行或同时完成时,则 多用as,可译为“一边......,一边......”。例如: • He looked behind from to time as he went.他一边走,一边不时 地往后看。 • As time goes on, it’s getting warmer and warmer..随着时间的 推移,天气变得越来越暖了。 • • I thought of it just as you opened your mouth.你一张嘴我就 知道你要说什么。(若表示两个短促动作几乎同时发生时,用as的场 合多于when.)
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