when和while的区别,分别在什么样的情况下使用

作者&投稿:毛世 (若有异议请与网页底部的电邮联系)
when与while的区别~

一、词义广泛性不一样
when
英 [wen] 美 [wɛn]
1、conj. 考虑到;既然;当…时;在…时;如果
2、adv. 什么时候,何时;(用于时间的表达方式之后)在那时;其时;当时
3、pron. 那时;什么时侯
4、n. 时间,时候;日期;场合
while
英 [waɪl] 美 [hwaɪl, waɪl]
1、conj. 当 ... 的时候;虽然;尽管;然而
2、n. 一段时间;一会儿
3、v. 消磨
二、词语用法不一样
1、when可用作从属连词,引导状语从句,表示时间时作“当…时,在…的时候”解;表示条件时作“如果,要是”解;表示对比时作“既然,考虑到”解。当when所引导的从句的主语和主句的主语一致时,常将其主语、系动词或助动词省去,只留实义动词或表语,或者改写为短语。
2、while用作连词时,表示“在…(过程)中,在…期间”。常用来引导时间状语从句,当主句的主语和while所引导的从句的主语一致时,while从句中的主语、谓语往往可以省去。while还可引导让步状语从句,意思是“虽然,尽管“,含有对比意味。

三、词义辨析不一样
1、when引导的从句作“当…时”或“每逢…”解,从句中的动作既可以和主句中的动作同时发生,也可以在主句的动作之前或之后发生;
例句:It was raining when we arrived.
我们到的时候正在下雨。
2、while引导的从句作“当…时”或“在…期间”解,它强调从句中的动作与主句中的动作同时发生,但持续时间一般较长或主句的动作在从句的动作过程中发生。
例句:Don't interrupt him while he is thinking.
他在思考时别去打搅他。

"when"和"while"都是英语中的从属连词,在句子中连接一个从句和一个主句,起到时间关系的作用,但在使用时有一些不同:"when"表示两个事件发生的时间是相互关联的,一个事件发生后另一个事件立即发生。例如: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。)I always drink coffee when I wake up. (我每天一起床就喝咖啡。)"while"表示两个事件发生的时间是同时进行的,它们可能会重叠或者在同一时间段内发生。例如:While I was watching TV, my phone rang. (当我在看电视时,手机响了。)I listened to music while I was cleaning the house. (我在打扫房子的时候听音乐。)总之,"when"和"while"都用来描述时间关系,但是"when"通常用于描述两个事件之间的先后关系,而"while"则通常用于描述两个事件之间的同时性。

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.
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.
具体你可以参考这一段.
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 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.
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 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.
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).
sb.had hardly(=scarcely) done sth.when...=Hardly / Scarcely had sb.done sth.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.
②I had hardly /scarcely entered my room when the telephone rang.=Hardly /Scarcely had I entered my room when the telephone rang.我刚一走进房门,电话就响了.
最实用的
when后跟的词可以为v-ed或v-ing(过去式)
while后跟的词必须为v-ing(过去式)
持续性动词用ing 短暂性动词用ed

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.
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.
具体你可以参考这一段.
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 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.
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 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.
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 roadsi

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。

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。

while只修饰瞬间动词,when延续性动词和非延续动词都可以

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喀喇沁左翼蒙古族自治县19866886818: while和when有什么区别?要简练 -
景狐创成: while和when都有当什么时候讲的意思.但是,前者强调同时发生,而后者可以是时间点,也可以是时间段. 估计您问得就是这个. 希望能够帮助到你.谢谢!

喀喇沁左翼蒙古族自治县19866886818: 英语中when和while的用法区别 -
景狐创成: when 和while的用法区别 两者的区别如下: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...

喀喇沁左翼蒙古族自治县19866886818: while和when的区别?
景狐创成: when 和while的用法区别 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...

喀喇沁左翼蒙古族自治县19866886818: when 和 while的区别啊?
景狐创成: when和while意思都是当......的时候,都可以接时间状语(从句),但用法有不同: when后常接非延续性动词,即表示动作是短暂的如: We were reading books when he came in. while后常接延续性动词,因此,一般while前后的动词都是ing形式的,如: We are watching TV while mother was cooking. 注意:while常是表示两种动作同时发生,而when有一前一后的意味.

喀喇沁左翼蒙古族自治县19866886818: 英语中when和while的区别 -
景狐创成: when引导的从句作“当…时”或“每逢…”解,从句中的动作既可以和主句中的动作同时发生,也可以在主句的动作之前或之后发生; while引导的从句作“当…时”或“在…期间”解,它强调从句中的动作与主句中的动作同时发生,但持续时...

喀喇沁左翼蒙古族自治县19866886818: while与when的区别详解
景狐创成: while与 when的区别: when,while这二个词都可以引出时间状语从句,它们的差别是:when 从句表示某时刻或一段时间 ,while 只表示一段时间 如: When he left the ...

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景狐创成: 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...

喀喇沁左翼蒙古族自治县19866886818: when和while的区别
景狐创成: 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...

喀喇沁左翼蒙古族自治县19866886818: when和while的区别?
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