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时间状语从句中whewhileas的区别(时间状语从句中的主将从现)

导语:时间状语从句中when, while, as的区别

时间状语从句中when, while, as的区别

1)when引导从句时,主从句的动作有先有后,也可以同时进行,从句的动作可以是持续性的,也可以是短暂的。

如:

When I got to the airport, the plane had already taken off. (主先从后)(短暂性)

When I lived there, I used to go to the seaside on Sundays. (同时) (持续性)

When the movie ended, the people went back. (从先主后)

2)while侧重主从句动作的对比,且从句的动词必须是持续性的。

如:

While we were chatting she was looking at the time table on the wall.

3)as引导从句时侧重主从句动作同时或几乎同时进行,从句的动作可以是持续性的,也可以是短暂的。

如:

Sometimes I watch TV as I am having breakfast.

4)when和while还可以是并列连词,意思分别是“就在这时”,“然而”。

如:

I was having a rest on the sofa when the telephone rang.

They were surprised that a child should work out the problem while they couldn’t .

注:并列连词when常用与以下句型中:

①…was/were doing…when…(正在做…突然)

②…was/were about to do…when…(刚要做…突然)

③…was/were on the point of doing…when…(刚要做…突然)

④…had just done…when….(刚一…就)

⑤Hardly/Scarcely had…done…when…(刚一…就)

好了,以上就是关于时间状语中when, while, as区别的介绍,还请大家在平时勤加练习。

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