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Tom his homework yesterday because he was in hospital all day.A. can’t finishB. couldn’t

时间:2023-05-04 02:40:49

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Tom his homework yesterday  because he was in hospital all day.A. can’t finishB. couldn’t

问题补充:

Tom his homework yesterday, because he was in hospital all day.

A. can’t finish

B. couldn’t finish

C. couldn’t have finished

D. mustn’t finish

答案:

A. can’t finish

B. couldn’t finish

(答案→)C. couldn’t have finished

D. mustn’t finish

解析:考查情态动词表示推测。根据第二句的过去时,说明是对过去的推测,使用“情态动词+have done”对过去的情况进行推测。如果是对现在情况的推测,使用“情态动词+动词原形”;句意:Tom不可能完成他的家庭作业,因为他整体都住院。故C正确。

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