until讲与练

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until与till的意义相同,都有“直到”、“直到……才”、“在……以前不”的意思。它们的使用方法是:
1. 作介词
作介词,后面通常接表时间的名词或短语。如:
He will wait until / till tomorrow. 他将一直等到明天。
We are back until / till 3 o'clock. 三点钟我才回来。
2. 作连词
作连词时,until和till引导时间状语从句。如:
Go along this road until / till you see the park. 沿着这条路走,直到你看到公园为止。
The guard won't let you in until / till you show your licence to him. 你出示证件卫兵才让你进去。
[特别警示]
1. 以上的状语从句的例句都是从句在主句之后,如果把从句放在主句之前,那么,引导词用till,不用until。 如:
Till you come back, I won't leave here. 直到你回来我才会离开这里。
2. 主句的动作是终止性的,要用not... until/till 句型。如上面的例句。
[对应练习]
I. 翻译下列句子。
1. 每天直到完成作业他才睡觉。
  _________________________________
                  
2. 直到下午五点半她才会见到她姑姑。
  _________________________________
II. 将下列句子改为not... till/until句型。
1. I can do the cooking when you buy something.
  _________________________________
2. He will go home after the school is over.
  _________________________________
Keys:
I. 1. He doesn't go to bed every day until / till he finishes his homework. / Till he finishes his homework, he doesn't go to bed every day.2. She will see her aunt until / till half past five in the afternoon.
II. I can't do the cooking until / till you buy something. 2. He won't go home until / till the school is over.

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