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关于反意疑问句的问题You must have studied English for three years,have

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/26 04:34:16
关于反意疑问句的问题
You must have studied English for three years,haven't you?/ didn't you?有两种反意疑问形式,为什么He must have finished it yesterday.有几种?
我是想问第二个句子实用haven’t he 还是didn’t he 还是两者都行?
may/must/can’t +have done +过去时间状语,表对过去情况进行推测,反义疑问句应用一般过去时.
It may/must have snowed last week, didn’t it?
he can’t have gone home last night ,did he >
may/must/can’t +have done 用于现在完成时表推测,反义疑问句应保留现在完成时.
He may /must have known the news, hasn’t he?
He can’t have done it, has he?
理解了吗?