来源:网络来源 作者:中考网编辑 2021-03-22 19:49:41
中考网整理了关于2021年中考英语知识点之状语从句的引导词,希望对同学们有所帮助,仅供参考。
不同类型的状语从句用不同的引导词
1.时间状语从句
① 时间状语从句常用when, as, while, before, after,since, till, until, as soon as等连词来引导。如:
While he was doing his homework, the telephone rang.
As he walked along the lake, he sang happily.
He had learned a little Chinese before he came to China.
After he finished middle school, he went to work in a factory.
② 在时间状语从句里,用一般现在时代替一般将来时,用一般过去时代夫过去将来时。如:
I’ll ring you up as soon as I get to New York.
I would tell him everything when he came back.
2. 条件状语从句
① 条件状语从句通常由if(如果), unless(除非)引导。如:
What shall we do if it snows tomorrow?
Don’t leave the building unless I tell you to.
② 在条件状语从句里,用一般现在时代替一般将来时,如:
I’ll help you with your English if I am free tomorrow.
He won’t be late unless he is ill.
③ “祈使句 + and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。如:
Hurry up, and you’ll catch the early bus.
= If you hurry up, you’ll catch the early bus.
Hurry up, or you’ll be late.
= If you don’t hurry up, you’ll be late.
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