知识点总结
在复合句中,由时间连接词引导的状语从句叫做时间状语从句。时间状语从句通常由when, while, as,after,before,since,until等词引导。
一、时间状语从句种类
1、引导的从句表示主从句的动作同时发生,或从句的动作在主句之前。when引导的从句的谓语动词可以是延续性的动词,又可以是瞬时动词。例如:
When she came in, I stopped eating.她进来时,我停止吃饭。(瞬时动词)
When I lived in the countryside, I used to carry some water for him.当我住在农村时,我常常为他担水。(延续性的动词)
We were about to leave when he came in.我们就要离开,就在那时他进来了。
2、Wh ile引导的从句的谓语动作必须是延续性的,并强调主句和从句的动作同时发生(或者相对应)。并且while有时还可以表示对比。例如: While my wife was reading the newspaper, I was watching TV. (was reading是延续性的动词,was reading和was watching同时 发生) I like playing football while you like playing basketball.我喜欢踢足球,而你喜欢打篮球。(对比)
3、As表示一边一边,as引导的动 作是延续性的动作,一般用于主句和从句动作同时发生;as也可以强调一先一后。例如: We always sing as we walk.我们总是边走边唱。(as表示一边一边) As we was going out, it began to snow.当我们出门时,开始下雪了。(as强调句中两个动作紧接着先后发生,而不强调开始下雪的特定时间)
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