must have done反义疑问句问题
1个回答

答案应该是didn't he

一、对现在情况的推测,问句部分用主动词(do,be)一般现在时的适当形式。若是现在进行时,问句部分用现在进行时的适当形式表示。若是there be结构,问句用isn't/aren't there。如:

1)He must be there,isn't he?

2)He must have a big family,doesn't he? ...