when和while区别资料讲解

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when 与while的区别

when 与while的区别

when 与while的区别1. when指某个时间点,表示瞬间动作;while 指某个时间段,表示延续性动作。

如:用when引导的状语从句表示时间,说明一个动作发生的时候,另一个动作正在进行。

如:—What were you doing when I came into the classroom? 当我走进教室的时候你正在干什么?—I was reading. 我正在读书。

—What was he doing when I came in? 当我进来的时候他正在干什么?— He was watching TV.他正在看电视。

When I got there, she was playing the violin. 我到那里时,她正在拉小提琴。

用when引导的时间状语从句也可以表示某一个动作已发生,另一个动作已经完成,已经完成的主句的动作用过去完成时态来体现。

When they arrived at the station, the train had left.当他们到达车站的时候,火车已经离开了。

用while连接的时间状语从句一般用过去进行时,表示正在进行某一个动作时发生了另一个动作,而主句常用一般过去时。

While I was playing the violin, he came to see me.我正在拉小提琴时,他来看我了。

While he was reading, the telephone rang. 当他正在读书的时候,电话铃响了。

While we were boating on the lake, we saw a fish jump out of the water.当我们正在湖中划船时,我们看见了一条鱼跳出了水面。

注意:英语中,延续性动作是由延续性动词发出的,瞬间性动作是由非延续性动词发出的。

延续性动词和非延续性动词的区别:延续性动词是指该动作可以延续一段时间,而不是瞬间结束,如work(工作)、study(学习)、eat(吃)、watch(观看);非延续性动词是指该动作极为短暂,瞬间便会结束,如start(开始)、begin(开始)、hit(撞)、see(看见)、knock(敲)、jump(跳)。

(完整版)when和while的用法区别

(完整版)when和while的用法区别

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。

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。

中考英语when和while的用法和区别

中考英语when和while的用法和区别

中考英语when和while的用法和区别when和while的区别一:when 当......之时(时间点),后接短暂性瞬间动词when在.....期间(时间段),后接延续性动词while在......期间(时间段),后接延续性动词因此,when可后接短暂性或延续性动词,而while只能接延续性动词。

后接短暂性终止性瞬间动词时,常用when,不用while;后接延续性动词时,when和while 常可替换使用;I was reading when you came in.当你进来的时候,我正在看书。

came是短暂性动词,此处when不能用while代替You came in while I was reading.= You came in when I was reading.read是延续性动词,此处when可用while代替when和while的区别二:1.表示正在做某事的期间,发生了意料之外的另一个短暂的动作,要对比这两件事,常用:主句(过去进行时-持续性动词),when从句(一般过去时-短暂性动词)We were playing games happily when we heard a cry.我们正在高兴地玩游戏的时候,(突然)听见了一声大叫。

2.若主句和从句的动作都比较长,表示同时发生,更常用while,此时可用进行时态或一般时态He waited in the car while l was in the shop.当我在店里的时候,他在车里等着。

He was watching TV while I was writing.当我在写作的时候,他正在看电视。

when和while的区别三:1.when可表示表示某个动作发生结束后紧接发生另一个动作,而while则不可When the bell rang, John went out of the classroom.铃声响后,约翰走出教室。

While与when的区别

While与when的区别

While与when的区别when和while引导的时间状语从句与这一时态连用。

所以区别when和while的用法成了这一单元的难点。

(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。

2、Were you writing when the teacher came in? 老师进来的时候,你在写信吗?3、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。

(二)、while只能表示某一段时间,不能表示某一点时间。

在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。

例如:1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。

2、You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。

(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 mother came back home yesterday evening. 昨天晚上妈妈回家的时候,我正在做家庭作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while从句中的动词必须是延续性动词。

when-和while的用法区别学习资料

when-和while的用法区别学习资料

w h e n-和w h i l e的用法区别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。

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。

when与while的用法与区别

when与while的用法与区别

when与while的用法与区别(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。

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。

2、Were you writing when the teacher came in?老师进来的时候,你在写信吗?3、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。

(二)、while只能表示某一段时间,不能表示某一点时间。

在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。

1、While Jim was mending his bike, Lin Tao came to see him.正当吉姆修自行车时,林涛来看他。

2、You can’t do your homework while you’re watching TV.你不能一边看电视一边做家庭作业。

(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。

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 mother came back home yesterday evening.昨天晚上妈妈回家的时候,我正在做家庭作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,when while as 三者可通用。

(完整版)when和while的用法区别

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 soundof 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。

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。

While与when的区别

While与when的区别when和while引导的时间状语从句与这一时态连用。

所以区别when和while的用法成了这一单元的难点。

(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。

2、Were you writing when the teacher came in? 老师进来的时候,你在写信吗? 3、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。

(二)、while只能表示某一段时间,不能表示某一点时间。

在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。

例如: 1、While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时,林涛来看他。

2、You can’t do your homework while you’re watching TV. 你不能一边看电视一边做家庭作业。

(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 mother came back home yesterday evening. 昨天晚上妈妈回家的时候,我正在做家庭作 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while从句中的动词必须是延续性动词。

when和while的区别

• 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
追求人生的美好!
我们的共同目标!
• 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
• 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.)

WHEN与WHILE用法区别

WHEN与WHILE用法区别when, while这三个词都有"当……时候"之意,但用法有所不同,使用时要特别注意。

①when意为"在……时刻或时期",它可兼指"时间点"与"时间段",所引导的从句的动词既可以是终止性动词,也可是持续性动词。

如:When I got home, he was having supper.我到家时,他正在吃饭。

When I was young, I liked dancing.我年轻时喜欢跳舞。

②while只指"时间段",不指"时间点",从句的动词只限于持续性动词。

如:While I slept, a thief broke in.在我睡觉时,盗贼闯了进来。

辨析①when从句与主句动作先后发生时,不能与while互换。

如:When he has finished his work, he takes a short rest.每当他做完工作后,总要稍稍休息一下。

(when = after)(When I got to the cinema, the film had already begun.当我到电影院时,电影已经开始了。

(when=before)②when从句动词为终止性动词时,不能由while替换。

如:When he came yesterday, we were playing basketball.昨天他来时,我们正在打篮球。

③当从句的谓语是表动作的延续性动词时,when, while才有可能互相替代。

如:While / When we were still laughing, the teacher came in.正当我们仍在大声嬉笑时,老师进来了。

④当从句的谓语动词是终止性动词,而且主句的谓语动词也是终止性动词时,when可和as通用,而且用as比用when在时间上更为紧凑,有"正当这时"的含义。

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w h e n和w h i l e区别
0when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。

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