英语 you must have read this book, didn't you 为什么用didn't？

Question

如题所述

Answer 1

have read 中,read是过去分词（read-read-read）
是过去完成时
首先排除mustn't you?mustn't 只能表禁止
don't you?时态不对
这里must表示猜测,这时反意疑问句问must后面的部分.
You must have done that,haven't you?
haven't you?也可以,5,you must have read this book, didn't you ?
用didn't是对过去的推测。
我是从事英语的。还有要问的吗？,2,must在表"推测"时，根据其推测的情况来确定反意疑问句。例如：
He must be there now, isn't he? 他现在肯定在那儿，是吧？
It must be going to rain tomorrow, won't it? 明天肯定要下雨，是吗？
陈述部分有must 的疑问句，疑问部分根据实际情况而定。例如：
...,1,mustn't you? 没有这个说法。。
haven't you? 可以用阿
don't you? 句子是past tense。。。不能用,1,no,1,英语 you must have read this book, didn't you 为什么用didn't
you must have read this book, didn't you
为什么用didn't,而不是mustn't you?
haven't you?
don't you?
有mustn't you的说法吗?