初中反义疑问句You must have made a mistake,haven’t you?　　They must

请看下面的说明：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?/ You must have met her this morning,didn’t you?b。若没有表示过去的时间状语,则疑问部分用haven’t / hasn’t提问。如 He must have been to Beijing,hasn’t he?/ The dogs must have eaten the food,haven’t they?你懂了吗?欢迎追问。希望我的回答能够帮到你,