Xiao Lin has been writing letters all afternoon but he should finish them now, shouldn’t he?

11. 在由“祈使句+附加疑问”构成的附加疑问句中，附加疑问部分一般用will you, won’t you等结构。如：

Don’t open the door, will you?

Give me some cigarettes, will you/ won’t you ?

但是，以let’s开头的祈使句，附加疑问部分用shall we;

以let us开头的祈使句，疑问部分用will you。如：

Let’s have a basketball match this afternoon, shall we?

Let us go out for a rest, will you?

三. 情态动词的情况

12. 当陈述部分带有情态动词must表示“必须”时，疑问部分用mustn’t。如：

You must work hard next term, mustn’t you?

I must answer the letter, mustn’t I?

但若表推测这层含义时，不能用must，而要根据陈述部分的不定式结构(即must之后的动词)以及含义采用相应的动词形式。如：

You must have made a mistake, haven’t you?

They must have seen the film last week, didn’t they?

He must be in the library, isn’t he?

13. 当陈述部分含有情态动词used to时，疑问部分可用usedn’t或didn’t。如：

The old man used to smoke, didn’t he?或usedn’t he?

Tom used to live here, usedn’t he?或didn’t he?

14. 当陈述部分带有情态动词ought to时，疑问部分用oughtn’t或shouldn’t。如：

He ought to know the answer, oughtn’t he?

We ought to read this book, oughtn’t we?或shouldn’t we?

15. 当陈述部分含有had better时，疑问部分用had。

如：?You’d better finish your homework now, hadn’t you?

四. 否定形式

16. 陈述部分带有seldom, hardly, never, rarely, few, little, nowhere, nothing等否定词或半否定词时，附加疑问部分的动词用肯定形式。如：

Bob rarely got drunk, did he?

Few people know him, do they?

She seldom goes to the cinema, does she?

如果陈述部分的否定词带有否定前缀，那么，该陈述部分作肯定处理，附加疑问部分一般仍用否定形式。如：

He was unsuccessful, wasn’t he?

Tom dislikes the book, doesn’t he?

五. 其他

17. 当陈述部分带有表示“所有”含义的动词have(has)时，疑问部分既可用have形式，也可用do形式。如：

You have a new bike, haven’t you(或don’t you)?

She doesn’t have any money in her pocket, does she?

(注意：You have to do it, don’t you? )

反意疑问句练习