must have done 的反义疑问句怎么说
问题描述：
must have done 的反义疑问句怎么说
答
didn't ...
答
didn't 等+主语
用一般过去式
答
当must后接完成式(即must + have + 过去分词),作“一定已经”讲,表示对过去的推测时：a.若有表示过去的时间状语,则疑问部分用didn’t / wasn’t / weren’t提问.如 She must have been here yesterday,wasn’t she?/...