1. She doesn't like fish. -> Doesn't she like fish?

2. The boss can't decide on this project. -> Can't the boss decide on this project?

3. My little sister usually plays up late. -> Doesn't your little sister usually play up late?

4. Let's go surfing. -> Shall we go surfing?

5. The children are sleeping. -> Aren't the children sleeping?

6. Do you have a bookstore? -> Don't you have a bookstore?

7. Many have completed their assignment. -> Haven't many completed their assignment?

8. The boys smoked a lot of cigarettes. -> Didn't the boys smoke a lot of cigarettes?

9. My mother has lovely hair. -> Doesn't your mother have lovely hair?

10. He doesn't speak English very well. -> Does he speak English very well?

11. Would you like a cup of tea? -> Wouldn't you like a cup of tea?

12. I'm your sister. -> Am I not your sister?

13. I'm not speaking just at the meeting. -> Am I speaking just at the meeting?

14. This was an interesting exercise. -> Wasn't this an interesting exercise?

15. Everyone finished the task. -> Didn't everyone finish the task?

16. Keep silent and do your homework. -> Don't keep silent and do your homework?

17. There will be a lot of guests tonight. -> Won't there be a lot of guests tonight?

18. Nothing makes her change her mind. -> Does something make her change her mind?

19. He seldom talks about his problems. -> Does he often talk about his problems?

20. These are the new students. -> Aren't these the new students?