问题补充:
He must have finished the work by the end of last month, he?
A. mustn
B. hadn
C. didn
D. hasn
答案:
A. mustn
(答案→)B. hadn
C. didn
D. hasn
解析:情态动词must在此表示推测,反意疑问句是将must去掉,因句中有by the end of last month,故用过去完成时,反意疑问句也用hadn 来构成。
时间:2023-11-30 01:03:09
He must have finished the work by the end of last month, he?
A. mustn
B. hadn
C. didn
D. hasn
A. mustn
(答案→)B. hadn
C. didn
D. hasn
解析:情态动词must在此表示推测,反意疑问句是将must去掉,因句中有by the end of last month,故用过去完成时,反意疑问句也用hadn 来构成。
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