按照反意疑问句的格式,主要注意情态动词肯定与否定的对应： Must - Needn't Need - Needn't Ought to - Oughtn't Have to - Don't Will - Won't Would - Wouldn't Shall - Shan't Should - Shouldn't Must have 表示对过去动作的推测,应该用didn't. 如果是以否定形式开头的句子,变成反意疑问句则相应用肯定形式,也会有一些特殊变化,建议找一本语法书,会有情态动词的用法这一类的.内容不会很多,容易记. 另外,反意疑问句中否定形式一定不能分开写.
