题目
when while as 过去进行时的用法
提问时间:2020-07-24
答案
这三个词 据我所知没有时态用法的区别
1.when 是指某个时间所发生的事,用于在完成时态
while是指某个时间段所发生的事,用于进行时态
2.①when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.
②while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.
③when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.
④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.
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.
⑦while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.
while可以表示对比 如
i like coffee while Tom like milk.
as与when,while都是引导时间状语从句的从属连词,含义都是"当……的时候".但它们有区别:用when时,从句的动作可以与主句的动作同时发生,也可以先于主句的动作发生;用while时,从句的动作为一过程,主句动作与从句动作同时进行或在从句动作过程中发生;用as时,主句和从句的动作同时发生,具有延续的含义.例如:
(1)It was raining when he got to the airport.他到达工地时,天正在下雪.
(2)someone knocked at the door while paul‘s mother was cooking.有人敲门的时候保罗的母亲正在做饭.
(3) You will grow wiser as you grow older.你会随着年龄的增长而越来越聪明
1.when 是指某个时间所发生的事,用于在完成时态
while是指某个时间段所发生的事,用于进行时态
2.①when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.
②while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.
③when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.
④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.
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.
⑦while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.
while可以表示对比 如
i like coffee while Tom like milk.
as与when,while都是引导时间状语从句的从属连词,含义都是"当……的时候".但它们有区别:用when时,从句的动作可以与主句的动作同时发生,也可以先于主句的动作发生;用while时,从句的动作为一过程,主句动作与从句动作同时进行或在从句动作过程中发生;用as时,主句和从句的动作同时发生,具有延续的含义.例如:
(1)It was raining when he got to the airport.他到达工地时,天正在下雪.
(2)someone knocked at the door while paul‘s mother was cooking.有人敲门的时候保罗的母亲正在做饭.
(3) You will grow wiser as you grow older.你会随着年龄的增长而越来越聪明
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