本人初二,想问过去进行时when和while和as的区别以及用法
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其实很容易理解 while 后加过去进行时 eg While Tom was watching TV,his mother came in .
但是当while两边都是同时发生的时候前后都用过去进行时 eg While Mary was singing ,Lucy was dancing .
when 后加一般过去时 When the teacher came in,the students were stopping talking.
as 用法和While 相似 As she was reading the newspaper,Granny fell asleep.
过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作,常和表过去的时间状语连用,如:
1. I was doing my homework at this time yesterday.
昨天的这个时候我正在做作业。
2. They were waiting for you yesterday.
他们昨天一直在等你。
3. He was cooking in the kitchen at 12 o'clock yesterday.
昨天12点,他正在厨房烧饭。
过去进行时的构成:
肯定形式:主语+was/were+V-ing
否定形式:主语+was not (wasn't)/were not (weren't)+V-ing
疑问形式:Was/Were+主语+V-ing。
基本用法:
1. 过去进行时表示过去某一段时间或某一时刻正在进行的动作。常与之连用的时间状语有,at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+点钟+yesterday (last night / Sunday…),when sb. did sth.等时间状语从句,如:
1)What were you doing at 7p.m. yesterday?
昨天晚上七点你在干什么?
2)I first met Mary three years ago. She was working at a radio shop at the time.
我第一次遇到玛丽是在三年前,当时她在一家无线电商店工作。
3)I was cooking when she knocked at the door.
她敲门时我正在做饭。
2.when后通常用表示暂短性动词,while后通常用表示持续性动词,而while所引导的状语从句中,谓语动词常用进行时态,如:When the car exploded I was walking past it. = While I was walking past the car it exploded.
3.when用作并列连词时,主句常用进行时态,从句则用一般过去时,表示主句动作发生的过程中,另一个意想不到的动作发生了。如:
I was walking in the street when someone called me.
我正在街上走时突然有人喊我。
4.when作并列连词,表示“(这时)突然”之意时,第一个并列分句用过去进行时,when引导的并列分句用一般过去时。如:
1)I was taking a walk when I met him.
我正在散步,突然遇见了他。
2)We were playing outside when it began to rain.
我们正在外边玩,这时下起雨来了。
过去进行时和一般过去时的用法比较:
1)过去进行时表示过去正在进行的动作,而一般过去时则表示一个完整的动作。
例如:They were writing letters to their friends last night.
昨晚他们在写信给他们的朋友。(没有说明信是否写完)
They wrote letters to their friends last night.
他们昨晚写了信给他们的朋友。(表达了他们已写好的意思,整个写的过程已完成。)
2)当动作延续较长时间时或表示厌烦、赞美等感情色彩时,常用过去进行时表示。
例如:He was thinking more of others than of himself.
他考虑别人的比考虑自己的多。(表示说话者赞扬的口气)
The boy was always making trouble then.
那时,他总是惹麻烦。(表示说话者厌烦的口气)
3. 状语从句:
在复合句中,修饰主句的动词,形容词或副词等的从句叫做状语从句。状语从句根据它表达的意思可分为时间、原因、条件、比较、目的、结果和让步等类型。
(根据考试说明,前四个要求掌握,其它要求理解)
时间状语(常由下列从属连词引导)
when, as ,while (当……时候; 一边…… 一边……;在……期间),
before(在……之前), after (在……之后), as soon as(一…… 就…… )
since (自从……时起到现在), till/until (直到……时) 等
例如:
1)When my cousin came yesterday, I was playing volleyball.
昨天我表哥来的时候,我在打排球。
2)When the air moves, it is called wind.
空气流动,就产生风。
3)As the boys walked along the lake, they sang happily.
这些男孩一边沿湖边走,一边愉快地唱歌。
4)While I was sleeping, the UFO arrived.
当我在睡觉时,UFO到达了。
when和while引导时间状语从句的区别:
when表示“当……的时候”。从句中既可用延续性动词,又可用非延续性动词,这些动词既可以表示动作,又可表示状态。从句中的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:Mary was having dinner when I saw her.
The boy was still sleeping when his mother got home yesterday morning.
When the teacher came in, the students stopped talking.
while表示“在……的时候”、“在……期间” 、“一边……一边……”。while从句中必须是表示动作或状态的延续性动词。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。
但是当while两边都是同时发生的时候前后都用过去进行时 eg While Mary was singing ,Lucy was dancing .
when 后加一般过去时 When the teacher came in,the students were stopping talking.
as 用法和While 相似 As she was reading the newspaper,Granny fell asleep.
过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作,常和表过去的时间状语连用,如:
1. I was doing my homework at this time yesterday.
昨天的这个时候我正在做作业。
2. They were waiting for you yesterday.
他们昨天一直在等你。
3. He was cooking in the kitchen at 12 o'clock yesterday.
昨天12点,他正在厨房烧饭。
过去进行时的构成:
肯定形式:主语+was/were+V-ing
否定形式:主语+was not (wasn't)/were not (weren't)+V-ing
疑问形式:Was/Were+主语+V-ing。
基本用法:
1. 过去进行时表示过去某一段时间或某一时刻正在进行的动作。常与之连用的时间状语有,at that time/moment, (at) this time yesterday (last night/Sunday/week…), at+点钟+yesterday (last night / Sunday…),when sb. did sth.等时间状语从句,如:
1)What were you doing at 7p.m. yesterday?
昨天晚上七点你在干什么?
2)I first met Mary three years ago. She was working at a radio shop at the time.
我第一次遇到玛丽是在三年前,当时她在一家无线电商店工作。
3)I was cooking when she knocked at the door.
她敲门时我正在做饭。
2.when后通常用表示暂短性动词,while后通常用表示持续性动词,而while所引导的状语从句中,谓语动词常用进行时态,如:When the car exploded I was walking past it. = While I was walking past the car it exploded.
3.when用作并列连词时,主句常用进行时态,从句则用一般过去时,表示主句动作发生的过程中,另一个意想不到的动作发生了。如:
I was walking in the street when someone called me.
我正在街上走时突然有人喊我。
4.when作并列连词,表示“(这时)突然”之意时,第一个并列分句用过去进行时,when引导的并列分句用一般过去时。如:
1)I was taking a walk when I met him.
我正在散步,突然遇见了他。
2)We were playing outside when it began to rain.
我们正在外边玩,这时下起雨来了。
过去进行时和一般过去时的用法比较:
1)过去进行时表示过去正在进行的动作,而一般过去时则表示一个完整的动作。
例如:They were writing letters to their friends last night.
昨晚他们在写信给他们的朋友。(没有说明信是否写完)
They wrote letters to their friends last night.
他们昨晚写了信给他们的朋友。(表达了他们已写好的意思,整个写的过程已完成。)
2)当动作延续较长时间时或表示厌烦、赞美等感情色彩时,常用过去进行时表示。
例如:He was thinking more of others than of himself.
他考虑别人的比考虑自己的多。(表示说话者赞扬的口气)
The boy was always making trouble then.
那时,他总是惹麻烦。(表示说话者厌烦的口气)
3. 状语从句:
在复合句中,修饰主句的动词,形容词或副词等的从句叫做状语从句。状语从句根据它表达的意思可分为时间、原因、条件、比较、目的、结果和让步等类型。
(根据考试说明,前四个要求掌握,其它要求理解)
时间状语(常由下列从属连词引导)
when, as ,while (当……时候; 一边…… 一边……;在……期间),
before(在……之前), after (在……之后), as soon as(一…… 就…… )
since (自从……时起到现在), till/until (直到……时) 等
例如:
1)When my cousin came yesterday, I was playing volleyball.
昨天我表哥来的时候,我在打排球。
2)When the air moves, it is called wind.
空气流动,就产生风。
3)As the boys walked along the lake, they sang happily.
这些男孩一边沿湖边走,一边愉快地唱歌。
4)While I was sleeping, the UFO arrived.
当我在睡觉时,UFO到达了。
when和while引导时间状语从句的区别:
when表示“当……的时候”。从句中既可用延续性动词,又可用非延续性动词,这些动词既可以表示动作,又可表示状态。从句中的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:Mary was having dinner when I saw her.
The boy was still sleeping when his mother got home yesterday morning.
When the teacher came in, the students stopped talking.
while表示“在……的时候”、“在……期间” 、“一边……一边……”。while从句中必须是表示动作或状态的延续性动词。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。
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都引导时间状语从句,但when更广,基本可以代替后两个词
when延续非延续动词都可以,但while加延续
表述两个发展变化中用as,所以常被翻译为”随着……随着……
注:时间状语从句中主将从现
when延续非延续动词都可以,但while加延续
表述两个发展变化中用as,所以常被翻译为”随着……随着……
注:时间状语从句中主将从现
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when 事件A, 事件B
事件A导致事件B,或两个事件同时发生。
while 事件A, 事件B
通常用进行时(ing),强调同时性
as 事件A, 事件B
和when差不多,但语气较弱;也可表原因,和because差不多,但语气较弱。
更多追问追答
追问
while是进行时是什么意思??when while as不都是过去进行时吗?
追答
When I got home, dinner was ready / dinner had been done. 不是过去进行。
While I was sleeping, he was reading. 都是过去进行时,强调两个动作/状态同时进行。
as ≈ when
As I got home, dinner was ready / dinner had been done.
as ≈ because / since
As I love reading, I frequently go to the bookstore.
如果是选择题,when和as都可以的话,选前者。
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1.when所引导的时间状语从句,其中的谓语动词既可以延续的,又可以是非延续的.并且与主句中的谓语动词的发生没有先后顺序(无所谓发生在主句动词之前,同时或之后).而while引导的时间状语从句,其中的谓语动词只能是延续性的,并且与主句中的谓语动词要同时发生.例:When he came,I was mending my bike. 不能说While he came,I was mending my bike. (came是非延续性动词)2.while引导的时间状语从句多用于进行时态(主句和从句都同时进行,一边...,一边...),而when一般用法较普遍.While he was doing his homework,his mother was cooking.He was a great scientist when he was young.3.as作“当……的时候”时引导短暂性动作的动词。As he went into the room,the man stopped shouting.(这句也可以用when)当从句表示"随时间推移"连词只能用as,不能用when或while.As the days went by,he became stronger.
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