题目内容
17. He must be helping the old man to water the flowers , ?
A. is he B. isn't he
C. must he D. mustn't he
17. B考查反意疑问句。陈述句中的谓语中虽有情态动词must,但此处must表示对现在进行时的推测,是对现在进行时的形式反问,故附加疑问部分用isn't he。
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题目内容
17. He must be helping the old man to water the flowers , ?
A. is he B. isn't he
C. must he D. mustn't he
17. B考查反意疑问句。陈述句中的谓语中虽有情态动词must,但此处must表示对现在进行时的推测,是对现在进行时的形式反问,故附加疑问部分用isn't he。