I don't think he must be sleepy, _______?I don’t think he must be sleepy, _______? A. mustn’t he B. do I C. must he D. is he 为什么答案选择D,不应该是C么,速度.求讲解

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I don't think he must be sleepy, _______?I don’t think he must be sleepy, _______? A. mustn’t he B. do I C. must he D. is he 为什么答案选择D,不应该是C么,速度.求讲解
I don't think he must be sleepy, _______?
I don’t think he must be sleepy, _______?
A. mustn’t he B. do I C. must he D. is he
为什么答案选择D,不应该是C么,速度.求讲解

I don't think he must be sleepy, _______?I don’t think he must be sleepy, _______? A. mustn’t he B. do I C. must he D. is he 为什么答案选择D,不应该是C么,速度.求讲解
must表示的是猜测的语气,而不是必须的意思.表示猜测的用助动词,表示必须才用must反问.

后面的问题是根据don't提的。。。是对助动词提的。。。

这是一个反问句。前面是be sleepy.所以D.must是个副词。

要用动词来反义疑问,must此时不是动词,在这里是表示猜测