He must have been sent to the hospital 改反意疑问句是didn't he 还是 wasn't he
问题描述：
He must have been sent to the hospital 改反意疑问句
是didn't he 还是 wasn't he
答
He must have been sent to the hospital，haven't he? /didn't he?
解析：
陈述部分有must 的疑问句，疑问部分根据实际情况而定。
例：
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?
祝你学习进步！
答
当must用来表示对过去的情况进行“推测”（must + have done）时,如强调对过去情况的推测（一般句中有过去的时间状语）,反意疑问句部分要用“didn’t + 主语”；如果强调动作的完成（一般没有过去时间状语）,反意疑问句部分要用“haven’t / hasn’t + 主语”.
例 She must have read the novel last week, didn’t she? 她上星期一定读了这本小说了,是吗?
You must have told her about it, haven’t you? 你一定把这事告诉她了,是吗?
你这一题如果句子后面还有表述时间的词的话,应该用didn't he.如果没有,应该是hasn't he.
wasn't 是不能用在此处的.