成人英语三级

2011年成人英语三级考试重点语法学习

3. 情态动词表示推测的用法：

(1) “情态动词+动词原型”表示对现在或将来的情况的推测

1) He must be in the library.

2) I don’t know where he is, she may be in Wuhan.

3) What he said can’t/couldn’t be true.

(2) “情态动词+动词的现在完成时，表示对过去情况的推测

1) Since the ditch is full of water, it must have rained last night.

2) Mr. Zhang isn’t here. He may have forgotten the meeting.

3) They can’t have finished the work so soon.

4. “情态动词+have + 过去分词”表示虚拟的用法

(1) must + have + 过去分词：表示对已发生的事情的一种肯定的猜测。

1）Mr. Green _______my letter, otherwise he would have replied before now. (1998) (B)

A. must have received     B. must have failed to receive

C. must receive           D. must fail to receive

2）I believe he ______an accident, otherwise he would have arrived on time. (2001) (D)

A. would have had   B. could have had  C. should have had   D. must have had

3) I can’t find the recorder in the room. It ______by somebody.  (2003)(11) (C)

A. must have taken         B. may have taken 

C. may have been taken     D. should have been taken

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