摘要：can, could, may, might, must 皆可表示推测.其用法如下: 1)情态动词+动词原形. 表示对现在或将来的情况的推测.此时动词通常为系动词.I don't know where she is, she may be in Wuhan. 2)情态动词+动词现在进行时. 表示对现在或将来正在进行的情况进行推测. At this moment, our teacher must be correcting our exam papers. 这时.我们老师想必在批改试卷 3)情态动词+动词完成时. 表示对过去情况的推测. We would have finished this work by the end of next December.明年十二月底前我们很可能已完成这项工作了.The road is wet. It must have rained last night.地是湿的.昨天晚上一定下雨了. 4)情态动词+动词的现在完成进行时. 表示对过去正在发生事情的推测. Your mother must have been looking for you.你妈妈一定一直在找你. 5)推测的否定形式.疑问形式用can't, couldn't表示. Mike can't have found his car, for he came to work by bus this morning. 迈克一定还没有找回他的车.因为早上他是坐公共汽车来上班的. 注意:could, might表示推测时不表示时态.其推测的程度不如can, may.
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---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.
|
A．will; should hand |
B．must; should have handed |
|
C．may; can’t hand |
D．can; could have handed |
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---Who can it be that hasn’t handed in his composition?
---It ______ be Robinson. He ______ it in yesterday.
|
A．will; should hand |
B．must; should have handed |
|
C．may; can’t hand |
D．can; could have handed |
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— _______ I ask you something, if you are not busy?
—Yes, of course you _______.
A. Should; should B. Could; can
C. Could; could D. Can; Could
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