状语从句中when while as 的区别？

优质解答

while,as,when 都可解释为“当…时候”,用来引导时间状语从句,但有区别：

1、while 意为 during the time that“在……期间”,表达一个“时间段”,不能表达“时间点”,从句的动词只限于持续性动词.例如：

One day while he was shopping in the supermarket,he saw his ex-wife with a man.

一天,他在超市购物时,他看到了他的前妻和一个男子在一起.

Strike while the iron is hot.

趁热打铁.

2、when 意为 at the time that“在…时”,多指“时间点”,例如：

When he returned from work,his wife was cooking.

他下班回家时,他的妻子正在做饭.

3、as 意为 at the same time that“正当……”或“与……同时”,它兼指“时间点”和“时间段”,从句的动词既可是短暂性动词,也可是持续性动词.例如：

The door bell rang as we were having breakfast.

正当我们吃饭的时候,门铃响了.

As the time went on,the weather got worse and worse.

随着时间的推移,天气越来越糟.

归纳：

总的说来,3者的功能区别大体可作如下描述：

while 为主句动作的发生划定一个时间的范围；

as 为主句动作的发生提供一个伴随的动作；

when 为主句动作的发生规定一个特定的时间.

其他类似问题

问题1：当when,while,as引导时间状语从句时,有什么不同?英语[英语科目]

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.

问题2：when ,while和as 引导时间状语从句的用法,越详细越好,[英语科目]

when,while和as的用法：

（1）三者均可表示“当……的时候”,如果主句谓语动词表示的是短暂的动作,而从句表示的是一段时间,三者可以通用.例如：

I met an old friend of mine as / when / while I was walking along the street.（当我沿街散步时,碰见了我的一个老朋友.）

（2）as和when引导的时间状语从句中,谓语动词可以是终止性动词,while引导的时间状语从句中,谓语动词一般是延续性动词.例如：

It was raining hard when we got to the airport.（当我们到达机场时,天正下着大雨.）（不能用while 引导）

（3）as强调主句谓语动词与从句谓语动词表示的动作同时发生；while强调主句谓语动词表示的动作持续于while从句所指的整个时间内；when可以指主句谓语动词和从句谓语动词所表示的动作同时或先后发生.例如：

She sang as she went along.（她边走边唱.）

Please listen to me carefully while I read.（我朗读的时候,请仔细听.）

When he reached home,he had a little rest.（回到家以后,他休息了一会儿.）

before的用法与前面三个词区别较大,具体如下:

1.表示“在…..之前就…..”.

Mary had finished her homework before her mother returned.

2.表示“过了多久后才……..,动作进行到什么程度才……”

The man almost knocked me down before he saw me .

They walked about 30 miles to the west before they saw a village .

They worked day and night about three days before everything returned to normal .

3.表示“来不及； 尚未…..就…”

Before I could get in a word ,he had measured me .

He ran off before I could stop him .

She left the company before I could have a word with her .

4.表示“刚…就…”

I had hardly sat down before the bell rang.

5.表示“不知不觉就…..； 还没弄清就……”

Time passed quickly and three months went by before Aqiao knew it.

6.表示“宁愿…,决不…,与其…,毋宁….”常与will 或would 连用.

I would die before I would tell

I’d shoot myself before I apologized to him.

I would / will die before I surrender .

7.表示“否则；以免”

Do it now before you forget .I will write it down before I forget it .

8.用于句型“it was +时间段+ before …” 表示 “过了多久才…”

It was three days before he came back..

9.用于句型 “ it was not long +时间段+ before …” 意为“不久就….”

It was not long before he sensed the danger of the position .

10.用于句型“it will be(not )+时间段+ before….”表示“要过多久/ 不久…才…”

It will be half a year before you graduate from this school .

It will be not long before you find you are wrong .

问题3：when,while,as在状语从句中的用法?抄笔记漏了,要补充[英语科目]

WHEN 一般是某个点发生的 “就在那时候,突然……”

while一般有对比的,翻译成“而在做某事”一般和现在进行时连用；

as 一般是伴随状态,某事发生伴随着另一件事的发生.

问题4：在时间状语从句中引导词just as,while,when有什么区别?

just as正如...之意

while后面+一段时间做的事情（如做作业）或者瞬间做的事情（即doing状的）

when+一段时间做的事情（when和while兼有的时候先选when）

【都是当...时之意】

问题5：状语从句中when while as 的分别用法[英语科目]

when, while和as的用法：

（1）三者均可表示“当……的时候”,如果主句谓语动词表示的是短暂的动作,而从句表示的是一段时间,三者可以通用.例如：

I met an old friend of mine as / when / while I was walking along the street. （当我沿街散步时,碰见了我的一个老朋友.）

（2）as和when引导的时间状语从句中,谓语动词可以是终止性动词,while引导的时间状语从句中,谓语动词一般是延续性动词.例如：

It was raining hard when we got to the airport. （当我们到达机场时,天正下着大雨.）（不能用while 引导）

（3）as强调主句谓语动词与从句谓语动词表示的动作同时发生；while强调主句谓语动词表示的动作持续于while从句所指的整个时间内；when可以指主句谓语动词和从句谓语动词所表示的动作同时或先后发生.例如：

She sang as she went along. （她边走边唱.）

Please listen to me carefully while I read. （我朗读的时候,请仔细听.）

When he reached home, he had a little rest. （回到家以后,他休息了一会儿.）

before的用法与前面三个词区别较大,具体如下:

1. 表示“在…..之前就…..”.

Mary had finished her homework before her mother returned.

2. 表示“过了多久后才…….. ,动作进行到什么程度才……”

The man almost knocked me down before he saw me .

They walked about 30 miles to the west before they saw a village .

They worked day and night about three days before everything returned to normal .

3. 表示“来不及； 尚未…..就…”

Before I could get in a word , he had measured me .

He ran off before I could stop him .

She left the company before I could have a word with her .

4. 表示“刚…就…”

I had hardly sat down before the bell rang.

5. 表示“不知不觉就…..； 还没弄清就……”

Time passed quickly and three months went by before Aqiao knew it.

6. 表示“宁愿…,决不…,与其…,毋宁….”常与will 或would 连用.

I would die before I would tell

I’d shoot myself before I apologized to him.

I would / will die before I surrender .

7. 表示“否则；以免”

Do it now before you forget . I will write it down before I forget it .

8. 用于句型“it was +时间段+ before …” 表示 “过了多久才…”

It was three days before he came back. .

9. 用于句型 “ it was not long +时间段+ before …” 意为“不久就….”

It was not long before he sensed the danger of the position .

10. 用于句型“it will be(not )+时间段+ before….”表示“要过多久/ 不久…才…”

It will be half a year before you graduate from this school .

It will be not long before you find you are wrong .