Question

一道反意疑问句的选择题

He knows so much about the story。He must have read the book，_____?
A hasn't he B didn't he
这里没有时间状语，应该怎么判断呢？请说一下理由，非常感谢啦
很急~~~~~在线等
这里是must have done 结构，是对过去猜测。

Answer 1

选a.这里虽没时间状语，可是“have read”这个动词结构已经很明显地告诉是用"HAVE"
其实我觉得看动词的时态就可以判断。
如果换成是“He had read the book"
答案就是b，"didn't he "

Answer 2

选A。
这类表对过去猜测的反义疑问句，有两种情况
1。有过去时间 用didn't
2.没有时间，用hasn't/haven't
He must have met her yesterday,didn't he?
You must have seen the film,haven't you?

Answer 3

B有一个很简便的判断方法叫还原法。去情态动词还原，以本题为例：还原为He has read the book来反意选B,若改为He must have read the book last year则还原为He read the book last year来反意选A.或者说有具体的过去时间用一般过去式来反意