He must be in the library now,________? A. doesn't he B.must
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He must be in the library now,________? A. doesn't he B.mustn't he C.needn't he D .isn't he
答案选D,求解释.
答案选D,求解释.
要看 must 在这个句子中属于什么词性,充当什么成分的
例句中的动词是be 也就是is的原型,must并不是情态动词,而仅仅表示猜测,所以选D
楼主可以看下这个贴,就能明白了
例句中的动词是be 也就是is的原型,must并不是情态动词,而仅仅表示猜测,所以选D
楼主可以看下这个贴,就能明白了
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