can, could, may, might, must 皆可表示推測.其用法如下: 1)情態(tài)動詞+動詞原形. 表示對現(xiàn)在或?qū)淼那闆r的推測.此時動詞通常為系動詞.I don't know where she is, she may be in Wuhan. 2)情態(tài)動詞+動詞現(xiàn)在進行時. 表示對現(xiàn)在或?qū)碚谶M行的情況進行推測. At this moment, our teacher must be correcting our exam papers. 這時.我們老師想必在批改試卷 3)情態(tài)動詞+動詞完成時. 表示對過去情況的推測. We would have finished this work by the end of next December.明年十二月底前我們很可能已完成這項工作了.The road is wet. It must have rained last night.地是濕的.昨天晚上一定下雨了. 4)情態(tài)動詞+動詞的現(xiàn)在完成進行時. 表示對過去正在發(fā)生事情的推測. Your mother must have been looking for you.你媽媽一定一直在找你. 5)推測的否定形式.疑問形式用can't, couldn't表示. Mike can't have found his car, for he came to work by bus this morning. 邁克一定還沒有找回他的車.因為早上他是坐公共汽車來上班的. 注意:could, might表示推測時不表示時態(tài).其推測的程度不如can, may. 【查看更多】

 

題目列表(包括答案和解析)

---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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—Who ________ it be that hasn't handed in his composition?

—It ________ be Robinson.He ________ it in yesterday.

A．can; will; should hand

B．can; must; should have handed

C．may; may; can't have handed

D．will; can; could have handed

 

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—Who ________ it be that hasn't handed in his composition?

—It ________ be Robinson.He ________ it in yesterday.

A. can; will; should hand

B. can; must; should have handed

C. may; may; can't have handed

D. will; can; could have handed

 

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