when和while引导的时间状语从句有什么区别,怎样区别使用它

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when与while 用于时间状语从句中有何区别~

一句话:在时间状语从句中,while能用when代替; 但是when却不一定能用while代替.

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:

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。赞同61| 评论(4)

一、谓语动词词性不同

1、when 引导的时间状语从句中,谓语动词可以是持续的也可以是瞬时的。

例句:When the teacher came in,we were talking.

当老师进来的时候,我们正在谈话。

2、while 引导的时间状语从句中,谓语动词必须是持续的。

例句:While he walked along the river, he heard a young boy calling "help".

当他沿着河散步的时候,听到一个小男孩正喊“救命”。

二、与主句中谓语动作发生时间不同

1、when句子中动作可以与主句中谓语的动作同时发生也可先于主句谓语动作发生。

例句:When the movie ended, all of the people went home.

电影结束以后,所有人都回家了。

2、while句子中动作与主句中谓语动作一定是同时发生,有时强调与主句谓语动作的对比。

例句:I was doing my homework while my mother was cooking.

妈妈做饭的时候,我在写作业。

三、时态不同

1、when引导的时间状语从句多用一般时态。

例句:I was doing my homework when my mother came back home yesterday evening.

昨天晚上妈妈回家的时候,我正在做家庭作业。

2、while引导的时间状语从句多用进行时态。

例句:While they were talking , the bell rang. 

正在他们谈话的时候,上课铃响了。



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 当……时候
while能用when代替; 但是when却不一定能用while代替.
while+从句, 动作一定会延续
when+延续性动词/瞬间动词; when he arrived
when he died
when,while强调动作同时发生
过去进行时 :
在过去的某一点时间, 或者是过去某一动作同时发生的另外一个动作
瞬间动词(arrive)无进行时态
I am arriving 进行时态表示将要
When he arrived,I was having dinner.
同时发生的两个动作, 均用过去进行时
When I was doing my homework,my mother was cooking.
When my mother was doing the housework,my father was watching TV.
同时发生的两个动作
1.一个用一般过去时, 另一个用过去进行时
2.分工的情况, 均用过去进行时
When the plane arrived,...were waiting inside the main building
while others were waiting on...
While...
...were keeping guard at the door,two others opened the parcel.
表面上是分工, 两个动作同时发生, 不是同时开始同时结束, 延续时间不一致,
长一点时间的动作用进行时态, 短时间的动作用过去时.
When someone knocked at the door,I was having dinner.

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,我正在做家庭作业。
when/while都可做并列连词.前者表and at that time,(这时,突然),后者表对比,可译为”然而”

I was going downstairs when the telephone rang.

Lucy is in blue while Lily is in green.

when后加瞬间动词 while后也可加持续性动词

【When与while 的区别与联系】
一、when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。
二、while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。
三、【辨析】
1、when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)
2.when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.【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引导时间状语从句,主句用过去进行时,从句应用一般过去时。
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>.When the teacher come in, we were talking.【当此句改变主从句的位置时, 应该用While we were talking ,the teacher come in. 我们正谈话的时候,老师进来了。(这是一个复合句。其中while we were talking 是由while引导的时间状语从句。这里while表示主句的动作是发生在从句所表示的时间之中。显然,while 所表示的是一段时间,不是表示一点时间。)
【试比较:
(1)、They were sweeping the floor when the teacher came in.
老师进来时(这一时刻),他们在擦地板。
(2)、While they were sweeping the floor, the teacher came in.
他们正擦地板时(这段时间),老师进来了。】
(3) I was doing my homework when my mother came back home yesterday evening. 昨天晚上妈妈回家的时候,我正在做家庭作业。】
【注意】:如果主句和从句的动作同时发生,,两句都用过去进行时的时候,多 用while引导。例如:They were singing while we were dancing.】
5. 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。如:
He came just as (or when) I reached the door.我刚到门那儿,他就来了。
6. 从句的谓语动词如表示状态时,通常用while。如:
We must strike while the iron is hot.我们应该趁热打铁。
7.while和when都可以用作并列连词。
Mike is tall while his brother is short.迈克的个子很高,然而他弟弟很矮。
Mary was on her way home when two big boys stopped her.玛丽正走在回家的路上,这时两个大个子男孩拦住她。
【【When与while 】】
1.while后面跟 时间段, when后面可跟 时间点 或 时间段(一般跟时间点).
2.while中主句和从句的 动作 必 同时发生, when中主句和从句 动作 可以是 同时发生,也可以是 不同时发生.
3.while中谓语动词必用延续性动词,when中可用延续性或瞬间性.
4.while可表示转折,when不行.

1.when引导的时间状语从句可以接一段时间或者一个具体的时间点
while引导的时间状语从句只能接一个时间点
2 when引导的时间状语从句结构为1.主句从句都是过去式
2.主句过去式,从句过去进行时(强调一个过去动作发生时,另一个过去动作正在进行。主句动词为瞬间性,从句动词为延续性)
3.主句将来时,从句一般现在时
while引导的时间状语从句结构为1.主句从句都是现在时(表示对比)
2.主句将来时,从句现在时
希望以上的回答对你有帮助

首先 很高兴 你有这个明确的目标 那我就祝你成功吧
对于 when 引导的是动作是短暂的条件状语从句 而while引导的是动作可以延续的条件状语从句 如果接动词 那么只有while后面用动名词形式 记住 啊
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尉迟苗舒康:[答案] 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...

怀化市17394319131: when和while引导的时间状语从句有什么区别,怎样区别使用它 -
尉迟苗舒康: 一、谓语动词词性不同 1、when 引导的时间状语从句中,谓语动词可以是持续的也可以是瞬时的. 例句:When the teacher came in,we were talking. 当老师进来的时候,我们正在谈话. 2、while 引导的时间状语从句中,谓语动词必须是持续的...

怀化市17394319131: when和while在时间状语从句的区别 -
尉迟苗舒康: 供参考(1) 假设A(维持较长的动作)B(较短暂的动作)(2) 当要用时间状语来将A与B连在一起时可以用 when 或 while(3) 准则是(i) when 放在较短暂动作的句子之前即A + when B或 when B +A(ii) while 放在较长动作之前即...

怀化市17394319131: when和while引导时间状语从句的区别及专项练习题 -
尉迟苗舒康: when英 [wen]美 [wɛn] conj. 考虑到;既然;当…时;在…时;如果 n. 时间,时候;日期;场合 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 pron. 那时;什么时侯 更多释义>> [网络短语] When 什么时候,何时,时间 Remember When 记得当时,曾几何时,记妥当时 When Rendering 只有在最后渲染时才重新计算更新效果,渲染时

怀化市17394319131: 八下英语五单元书上由when和while引导的时间状语从句 -
尉迟苗舒康: when 表示“(这时)突然”之意时,它后面的并列分句用一般过去时,而与之对应的另一个分句用过去进行时;例:I was taking a walk when i met him. 我正在散步,突然遇见了他.while表示“当......的时候,和......同时”,引导时间状语从句;...

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