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时间状语从句就是在复合句中表示主句动作发生时间的状语从句。时间状语从句是所有状语从句中用得最经常的一种,并且用于引导时间状语从句的引导词也比较多,在学习时间状语从句时最重要的是记住这些引导词有哪些,它们的意思怎样等。到底时间状语从句可以用哪些词来引导呢?请看下文:
1. 用when引导:when表示当时候。如:
Things were different when I was a child. 我小时候情况与现在不同。
People breathe more slowly when they are asleep. 人睡觉时呼吸比较缓慢。
2. 用while引导:while表示当时候。如:
We must strike while the iron is hot. 我们要趁热打铁。
I went swimming while the others played tennis. 我去游泳,其余的人都打网球去了。
注意:while 所引导的时间状语从句中谓语动词必须是持续性的,不能是短暂性的。
3. 用as引导:as表示当时候随着。如:
He dropped the glass as he stood up. 他站起来时,把杯子摔了。
We get wiser as we get old. 随着年岁的增长,我们也变得聪明些了。
4. 用before引导:before表示在之前。如:
Turn off the lights before you go to bed. 睡觉前要关灯。
Before he went to university he was a worker. 上大学之前他是工人。
5. 用after引导:after表示在之后。如:
I will tell you after they leave. 他们走我再告诉你。
After you finish the letter show it to me.信写完后给我看看。
6. 用until / till引导:until / till表示直到。如:
He waited until she was about to leave. 他等着一直到她准备离开。
I watched him until he disappeared in the distance. 我瞧着他直到他在远处消失。
这类句型的主句动词通常只能是延续性动词,不能是终止性动词。但是,在否定句中,主句动词可以是终止性动词,此时构成notntil [till]句式,意为直到才。如:
She didnt marry until she was over fifty. 她直到五十多岁才结婚。
Wed better not go until your sister arrives. 我们最好等你姐姐到了再走。
7. 用since引导:since表示自从以来。如:
We have known each other since we were children. 我们从小认识。
Theyve moved twice since they got married. 他们结婚后已搬了两次家。
这类句子的主句通常用现在完成时。但是,当主句表示一段时间时,可用一般现在时代替现在完成时。如:
Its a long time since we met last. 好久没见面了。
How long is it since you came in London? 你来伦敦有多久了?
8. 用as soon as引导:as soon as表示一就。如:
The boys ran off as soon as we appeared. 我们一来,孩子就都跑了。
He started as soon as he received the news. 他一接到消息就出发了。
表示一就这一意思的连词,除as soon as外,还可用the moment, the minute, the instant等。如:
I want to see him the minute he arrives. 他一来到我就要见他。
The moment I saw him I knew there was no hope. 我一看到他就知道没希望了。
9. 用every time等引导:any time, each time, every time, the first time, the last time, the next time等有时也可用连词,引导时间状语从句,分别表示任何时候每次第一次最后一次下次等。如:
You can call me any time you want to. 你随时都可以给我打电话。
Each time I went there, I saw him working. 我每次去那儿都看见他在工作。
Every time I call on him, he is out. 我每次去访问他,他都不在。
Next time you come in, please close the door. 下次你进来,请关门。
10. 间状语从句的时态:当主句为将来时态或含有将来意义时,时间状语从句习惯上要用一般现在时表示将来意义,而不能直接使用将来时态。如:
■趁早动手,免得忘了。
误:Do it before you will forget.
正:Do it before you forget.
before引导的时间状语从句不能直接使用将来时态,而通常用现在时表示将来意义。
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