must have done后的反意疑问句

He must have been very depressed when he heard the news,  ____？金桥翻译cXVJr7b0_$`BUl
A. haven't he  B. didn't he  C. wasn't he
+\]p)CD8W*p;U9d0答案是C.?我觉得不是A就是B,为什么会是C呢?金桥翻译A%~Nlp8|

[解答]对于情态动词+ have done的反意疑问句，有两种！金桥翻译uK7G{*~Us$[t
1，在无明确时间时，此题应选A。但此题有明确时间即when he heard the news.所以，排除A金桥翻译k%~6NH1Q@H-i:P
2，反意疑问的疑问对象是主句have been very depressed，而非从句。反意疑问句应有be动词，故选C

[习题]金桥翻译m2C3N!nL7O1pDBJ5[

(1)Mr. Johnson must have come back yesterday, _______?

(2)He must have waited here for a long time, _______?

A. hasn’t he     B. haven’t he 

C. mustn’t he    D. didn’t he金桥翻译_
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解答：DA 因为（1）有yesterday这个时间状语；（2）中for a long time是虚晃一枪，并不是做某事的具体时间状语，故选A

以上例题再加两道习题，似乎已把情态动词+ have done的反意疑问句作了终极的完美解释。但这种解释却是错误的

结论是：

You must have done sth. (无论加不加时间状语)，mustn't you?

以下是从网上搜出的英语本族语人士关于翻译疑问句的语法条文：金桥翻译q2m+P"^8[v8Sx

http://www.englishgrammarsecrets.com/questionstags/menu.php

Questions tags金桥翻译+i|-jW2a~

We use tags in spoken English but not in formal written English.金桥翻译:n2fa1`5E.zkx

They are not really questions but are a way of asking the other person to make a comment and so keep the conversation open.

 Making a tag is very mechanical.

To make a tag, use the first auxiliary. If there is no auxiliary, use do, does or did. With a positive sentence, make a negative tag and with a negative sentence, make a positive tag.金桥翻译R9?1si
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它在练习3有个配套练习，He must have seen it,答案是mustn’t he?金桥翻译
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A

其他的相关练习：金桥翻译8nu`E;n9VVH

They can’t have finished yet, can they?金桥翻译2l;Z4@ maz#?B,Ev

She shouldn’t have said anything, should she?

It must be him, mustn’t it?

以下是英美人士对这个问题的看法：

Q:1a:She must have finished her homework yesterday, didn't she?   金桥翻译}k8p'b's

No, this doesn't work. 

"She had to have finished her homework yesterday, hadn't she?"   or金桥翻译2O$O@(I8[`0r.VG8L`

"She must have finished her homework yester- day,  mustn't she?"  (I don't like this one so much though.) 

1b:She must have seen the film, hasn't she ?   金桥翻译 Jr"|/y9v5w7mi

No, this won't work. 金桥翻译[&v%Y8JB$_T

"She has seen the film, hasn't she?"

2a:He couldn't have read the book so quickly, could he? Okay

2b:She wouldn't have given me the book, would she? Okay金桥翻译u.IOZ$[

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I regret your books are wrong. What ***** has said is 100% correct.
%Ei7{6p4F0If you have to stick to the original questions, then you get:
3A3V{Dw*['yuFK01a:She must have finished her homework yesterday, mustn't she?     

1b:She must have seen the film, mustn't she ?   
_'@-`*m`(x[ f[-h
n|0Not attractive, I agree, but correct. Your alternatives, I repeat, are just plain wrong.

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网上有蛮多的免费英语学习网站，中国有个笑话：“生了胡子的就是老子”。没有老外教过的外语肯定不太行，但我们也不要一看到老外就顶底膜拜，在网上也要注意观察，找出真正的专业性老师很重要。金桥翻译#vI.X ZE8`