when和while引导的时间状语从句是什么?

2025-03-16 00:09:40
推荐回答(1个)
回答1:

when和while引导的时间状语从句的用法是不同的,部分情况可以替换,部分不可以,具体如下:

1、若主句表示的是一个短暂性的动作,而从句表示的是一个持续性动作时,两者都可用。如:

He fell asleep when he was reading.

他看书时睡着了。

I met him when I was taking a walk in the park.

我在公园散步时遇到了他。

2、若主、从句表示两个同时进行的持续性动作,且强调主句表示的动作延续到从句所指的整个时间,通常要用while。如:

Don’t talk while you’re eating.

吃饭时不要说话。

I kept silent while he was writing.

在他写的时候,我默不作声。

3、若从句是一个短暂性动作,而主句是一个持续性动作,可以when但不用while。如:

When he came in, I was listening to the radio.

他进来时,我在听收音机。

It was raining hard when we arrived.

我们到达时正下着大雨。

4、若主、从句表示的是两个同时(或几乎同时)发生的短暂性动作,一般要用when。如:

I thought of it just when you opened your mouth.

就在你要说的时候,我也想到了。

when和while的时态:

when从句的时态一般是一般时态,while从句的时态一般是进行时态。主句是过去进行时,从句是一般过去时时用when;主句是一般过去时,从句是过去进行时时用while。

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