10. had

11. did

12. didn’t forget

13. hadn’t eaten

14. were

15. didn’t smoke

16. saw

17. were

18. didn’t put

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5. If you didn’t drink too much coffee you could sleep.

6. If you make me some coffee, I'll give you some sweets.

7. Unless you had told me about Sue's hair, I wouldn't have noticed her.

8. Should you see Peter, tell him he should be here at 8.00.

9. If you were to ask me to marry you, I wouldn't accept.

10. Supposing there were an earthquake what would you do?

11. You do the shopping, and I'll cook lunch.

12. If you were to find some buried treasure what would you do?

13. But for John's not being interested, the project would have been abandoned.

14. If you happen to find my wallet, could you let me know?

15. If I am late, start without me.

16. If it hadn't been for the night watch-man, the fire wouldn't have been brought under control.

17. If a detective hadn't recoginzed Dick, he wouldn't be in prison.

18. If I were you, I would think twice about buying a car like that.

19. Finish the painting by Saturday and we'll pay you extra.

20. If I get up early, I feel hungry.

21. I'd rather you didn't eat in the classroom.

22. I think it's time we left now.

23. If only hadn't eaten all the food.

24. I wish we had a TV.