when 和while的区别和用法?(举些简单的例子)
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when 和while的区别和用法?(举些简单的例子)
哎呀,激心死了~我好像理解能力好差~谁来救我额!
哎呀,激心死了~我好像理解能力好差~谁来救我额!
(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 注意:
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. 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.
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 注意:
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. 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.