含有情态动词must的反意疑问句

Question

He must have stayed up last night,( )? A.mustn't he B.needn't C.hasn't he D.didn't he 正确答案为D,能给我讲一下B和D的区别吗?以及含有must的反意疑问句应该怎么判断正确选项.谢谢!

Answer 1

原句子是正确的吗？应该是He
must
stayed
up
last
night,didn't
he?
must表示推测时，反义疑问句和后面该有的助动词一致，题中行为动词就是didn't，must表示必须时，用musn't，不会用到needn't，除非是
Must
I
go
now?
No,you
needn't