Question

初中英语题。

——I hear your mother is terribly ill.She must be in hospital now,___?You must go back home to look sfter her right now,___?
——Yes,Imust go by train immediately.
A isn't she,needn't you B mustn't she,mustn'you
C needn't she,needn't you D is she,must you(求详细解释。

Answer 1

B

因为反义疑问句前肯后否。

She must be in hospital now中must是动词，而must又是一个情态动词，变否定直接变成mustn't，主语是she，照抄就可以了。

You must go back home to look sfter her right now中must是动词，而must又是一个情态动词，变否定直接变成mustn't，主语是you，照抄就可以了。

Answer 2

陈述部分有must 的疑问句，疑问部分根据实际情况而定。
He must be a doctor, isn't he?
You must have studied English for three years, haven't you? / didn't you?
He must have finished it yesterday, didn't he?

must在表"推测"时，根据其推测的情况来确定反意疑问句。
He must be there now, isn't he?
It must be going to rain tomorrow, won't it?

故答案为A。

Answer 3

A.

She must be, 她一定是，反问针对“是”也就是“be”

后面是 must do sth., must的反意疑问用needn't

Answer 4

A

Answer 5

A