when,while,as引导时间状语从句的区别

合集下载

as when while引导时间状语从句的区别

as when while引导时间状语从句的区别

as when while引导时间状语从句的区别“as”、“when”和“while”都可以引导时间状语从句,但它们在用法和其他方面存在一些区别。

1. as 引导时间状语从句as 引导时间状语从句表示“当……时候”、“一边……一边……”的含义,强调主句和从句的两个动作同时发生。

as 引导的时间状语从句通常用进行时态。

例如:* We will go for a walk as soon as we finish our homework.(我们完成作业就去散步。

)* Please keep quiet as you're walking past the library.(当你经过图书馆时,请保持安静。

)2. when 引导时间状语从句when 引导时间状语从句表示“当……时候”、“在……之后”的含义,强调主句和从句的两个动作先后发生。

when 引导的时间状语从句可以用不同的时态。

例如:* I will call you when I arrive at the airport.(当我到达机场时会给你打电话。

)* He had just finished his homework when his mother came home.(当他妈妈回家时,他刚刚完成作业。

)3. while 引导时间状语从句while 引导时间状语从句表示“在……期间”、“与……同时”的含义,强调主句和从句的两个动作同时发生。

while 引导的时间状语从句通常用进行时态。

例如:* While we were chatting,the phone rang.(当我们正在聊天时,电话响了。

)* While she was cooking,the children were playing outside.(当她正在做饭时,孩子们在外面玩耍。

)总之,as、when和while都可以引导时间状语从句,但它们在用法和其他方面存在区别。

when、 as、 while引导的时间状语从句

when、 as、 while引导的时间状语从句






二.选择最佳答案: 1.She thought I was praising her child, _____,in fact,I was scolding him for his bad behaviors at school. A.what B.while C.so that D.therefore 2.I do every single bit of housework ____ my husband Bob just does the dishes now and then.(2004全国卷II35) A.while B.since C.when D.as 3.______ it is expected that students come university with the ability to take a good set of notes,this is not always the case. A.When B.As C.For D.While
when、 as、 while 引导的时间状语从 句


1. when、 as、 while引导的时间状语从句分析: (1) when引导时间状语从句时表示“当……的 时候”, when既可以指时间段也可指时间点, 从句中既可用延续性动词又可用非延续性动词, 且动作既可和主句的动作同时发生又可在主句的 动作之前或之后发生, 注意体会如下例句: I’ll call you when I get there. 我一到那里 就给你打电话。

三、While作并列连词用,意思为“而,然而”, 表对比。而but表转折。注意用心比较体会while 与but的句中用意 1.Some people waste food while others haven't enough. 有些人很费粮食,然而有些人却吃不饱。 2.The son was having a good meal at home,while the parents were working in the fields. 儿子在家吃好饭而父母却在田里辛勤劳作。 3.I ought to have helped her,but I never could. 我本该帮她但没能。

when,while,as引导时间状语从句的区别

when,while,as引导时间状语从句的区别
① As the time went on,the weather got worse.(as表示“ 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.
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。
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。
4.在将来时从句中,常用when,且从 句须用一般时代替将来时。
①When 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。
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。

when_while_as引导时间状语从句的区别

when_while_as引导时间状语从句的区别

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 phone call,I was writing a letter. (make为延续性动词)当她在打电话时, 我正在写信。
when_while_as引导时间状语从句的区别
② As 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。 ③ The little girls sang as they went.
小姑娘们一边走,一边唱。
when_while_as引导时间状语从句的区别
4.在将来时从句中,常用when,且从 句须用一般时代替将来时。
When 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。
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…
Eg:我刚一闭上眼,就有在敲门了。
I had hardly/scarcely closed my eyes when someone knocked at the door.

when和while和as的区别口诀

when和while和as的区别口诀

when和while和as的区别⼝诀
As多⽤于动作发⽣时间较短时,when表⽰“当……的时候”,while所引导的从句中的动词是延续性的。

当从句和主句的动作同时发⽣,但因为从句动作arrived是⾮延续性的,表⽰的是“⼀瞬间”,此时不可⽤while,但可⽤as替换。

when和while和as的区别
while引导的时间状语从句,在句中表⽰某⼀段时间内发⽣的事情,常译为“当……时”。

从句谓语动词必须⽤延续性动词,且常与现在进⾏时搭配。

when引导的时间状语从句,既可以表⽰“某⼀段时间”,也可以表⽰“某⼀时刻”。

从句中谓语动词可以是延续性动词,也可以是⾮延续性动词。

as强调两个动作的同时性,表⽰“⼀边……⼀边……”。

when和while和as的例句
As I got on the bus,he got off.
我上车,他下车。

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

When he came back,I was doing some washing.
他回来时,我在洗⾐服。

When,While,As引导时间状语从句的区别

When,While,As引导时间状语从句的区别

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 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。

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 phone call,I was writing a letter.(make为延续性动词)当她在打电话时,我正在写信。

when、as、while引导的时间状语从句用法区别

when、as、while引导的时间状语从句用法区别

(1) when引导时间状语从句,表示“当……的时候”,when既可以指时间段,也可指时间点,从句中既可用延续性动词,也可用非延续性动词,且动作既可和主句的动作同时发生,又可在主句的动作之前或之后发生。

例如:When the decision was read out Mrs Gardner thanked the judges. 判决书宣读完,加德纳夫人向法官们表示感谢。

When the wind blows, all the doors rattle. 只要风一吹,这门就吱嘎作响。

He stopped trying, when he might have succeeded next time. 他不再试了,其实他可能下一次就成功。

When you are sitting, keep your elbow on the arm rest. 坐立时,把胳膊肘靠在扶手上。

如果when引导的时间状语从句的主语与主句主语相同,而从句的谓语又是be动词时,那么从句中的主语和be可以省略; 当when引导的时间状语从句的主语与主句主语相同时,往往还可以用“when+分词”的形式替代该状语从句。

例如:When (you are) in trouble, ask her for help. 当你遭遇麻烦的时候去向她求助。

When I came into the room (=When coming into the room), I found him lying there dead. 当我进入房间的时候,我发现他躺在那儿死了。

(2) while引导时间状语从句时表示“当……的时候”,它强调主句的动作与从句的动作同时持续地进行,用于这一用法时while引导的时间状语从句和主句中的谓语动词必须是延续性动词,或者主句的动作发生在从句动作的进行过程中,主句中的谓语动词通常是非延续性动词例如:Study while you study; play while you play. 该学习的时候就学习,该玩的时候就玩。

when,while,as引导时间状语从句的区别是什么?

when,while,as引导时间状语从句的区别是什么?

when,while,as引导时间状语从句的区别是什么?when和while的区别1.when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。

I was just reading a book when she came into my room.她走进我房间时,我正在看书。

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。

2.when 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。

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

3.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。

While they were talking , the bell rang. 正在他们谈话的时候,上课铃响了。

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4.when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: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。

  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

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。

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。

④The 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。

①As the time went on,the weather got worse.(as表示“随着……”之意)
②The 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。

since是用于完成时,作“自从……”意思是有两种用法,1.例如:I have been a teacher since two years ago./ I was twenty./ I came here.(若要用动词,一定要用短动词的过去式)2.例如:It is/has been 2 years since I came here.(前面要用一段时间,后面用短动词的过去式)
when在用作“当……的时候”时应注意主句用将来时,从句用一般时。

If可引导条件状语从句,意为“如果”,它也可以引导定语从句的问句,此时,if 和weather都可用,但当后面有or not时,就只能用weather,因为weather...or not是固定搭配!
例如:1.Can you tell me if she is here.
= Can you tell me weather she is here.
2.Can you tell me weather she is here or not.。

相关文档
最新文档