11. He used to get up early, didn't he/ usedn't he?(当陈述句含有used to 时，简略问句用did,也可重复used.)

10. The boys mustn't play with fire, may they?(当must表示"禁止"时，反意问句要用may.)

9． You must have seen the film "Shaolin Brothers", haven't you?(当must+不定式的完成式表示对过去事情的推测时，用have。)

8． It must be Xiao Wang, isn't it?(must be在这里表示推测，要用be 的适当形式)

7． We must study all the subjects well, needn't we?(must在这里不表示"必须"，只表示"有必要"， 所以不重复must, 要用need.)

6． Let us go for a walk, will you?/won't you?(Let us 不包括听话者，而是向听话者提出建议或要求。)

5． Let's go to the station shall we?(Let's 包括听话者，所以用shall we?)

4． Don't forget to write a letter to me, will you?(在否定祈使句中，只用will you?)

3． Open your books, would you/won't you? (陈述句对第二人称的祈使句，简略问句可用will you? Won't you? Would you? Can you? 或can't you?)

2． I don't think he is a doctor, is he? (陈述句是转移否定，反意疑问句的主语和谓语必须和从句一致。)