I'm afraid it is going to rain, isn't it? 恐怕要下雨了，不是吗？

（四）关于情态动词的反意疑问句

1. 陈述部分中有have一词，且表示"所有"含义时，反意疑问句部分既可用have也可用do。

　You have a bike, haven't you/don't you?

2. 陈述部分中有have to，反意疑问句部分用do。

　He had to go to work when he was very young, didn't he?

3. 含有ought to 的反意疑问句，陈述部分是肯定的，疑问部分用shouldn't/oughtn't +主语。

He ought to know what to do, oughtn't he/shouldn't he?

4. 陈述部分有used to，反意疑问句部分可用used 也可以用did 。

He used to get up early, usedn't he/didn't he?

5. 陈述部分有needn't时，反意疑问句部分用need但有时也可用must。

We needn't do it again, need we ?

6. 陈述部分有must，且表示"必须"时，反意疑问句部分用mustn't，如果表示"必要"则用needn't。

You must leave at once, mustn't you?

　You must leave at once, needn't you?

7. 陈述部分中是mustn't表示"禁止"时，反意疑问句部分用must。 陈述部分中的must表示"一定"、"想必"等推测意义时，反意疑问句部分而是根据陈述部分的谓语动词或其助动词来定。

You must's smoke here, must you?

　He must be there now, isn't he?

8. 陈述部分是I wish，表示询问或征求意见，反意疑问部分用may I。

I wish to go with them, may I?

9. 陈述部分的主语是each of...结构时，反意疑问句在强调整体时用they， 作个别时用he。

Each of the boys has a map, don't they?

10. 陈述部分有neither... nor...(either...or...)做并列主语，反意疑问部分根据其实际逻辑意义而定。

Neither you nor I am engineer, are we?

11. 陈述部分是：I'm ....结构，反意疑问句一般用aren't I?

I'm wrong, aren't I?

12. 陈述部分有had better + v. 疑问句部分用hadn't you?

　You'd better read it by yourself, hadn't you?

13. 陈述部分有would rather +v.，疑问部分多用 wouldn't +主语。

　 He would rather read it ten times than recite it, wouldn't he?

14. 陈述部分有You'd like to +v. 疑问部分用wouldn't +主语。

　 You'd like to go with me, wouldn't you?

15. 带情态动词dare或need的反意疑问句，疑问部分常用 need (dare ) +主语。

　 We need not do it again, need we ?