did he
当must/could/might/may have done表示对过去的情况进行推测（一般句中有明确的过去时间状语）,问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”；如果强调动作的完成（一般没有明确的过去时间状语）,问句要用“haven't/hasn't+主语”.
She must have read the novel last week,didn’t she?她上星期一定读了这本小说,不是吗?
You must have told her about it,haven’t you?
你一定把这事告诉她了,不是吗?