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5. If the driver in front hadn't stopped so suddenly, the accident wouldn't have happened. 
6. If I had known you wanted to get up early, I would have woke up. 
7. If I hadn't walked in the rain, I wouldn't have had a cold. 
8. If she had brought enough moeny with her, she would have bought the watch.
9. If their children hadn't wanted to keep it, they would have sold the house.
10. If Mrs.White hadn't been took weak, she hadn't fallen down.

11. If he had done the exams well, he wouldn't have failed.
12. If she hadn't had to work overtime, she could have come. 
13. If you hadn't spoken so softly, he could have heard you well.
14. If I hadn't been having a bath, I could have answered the phone.
15. If he had the money, he could afford a new car.
16. If Susan hadn't eaten 4 cream cakes, she wouldn't have felt sick.
17. If we had known your phone number, we could have contacted you.
18. If the price of petrol hadn't been raised last month, car sales wouldn't have dropped again.
19. If I didn't have a date with my own classmates, i could go to the beach with you this weekend.
20. If she had hurried, she wouldn't have missed the train.
21. If I didn't have lots of good friends, I would get very lonely.
22. If we had had enough time, we would have gone on holiday.
23. If we had enough time, we wouldn't have got lost.
24. If it didn't rain heavily, the match couldn't be cancelled.
25. If he had been careful, he wouldn't have lost all his money.

26. If Simon lived near his mother, he could visit her often.
27. If he hadn't failed his final examination, his parents wouldn't have been very disappointed.
28. Unless you had told me about Sue's hair, I wouldn't have noticed.
29. Unless you take morning exercise, you will be weak.
30. Unless you see that film, you will be sorry.
31. Unless you take a map with you, you will get lost.
32. Unless he tells them the truth, they will kill him.
33. Unless we protect the forest, the environment will be soon destroyed.
34. Unless she calls me, I won't wait.
35. Unless it is too expensive, I will choose that blue jacket.
36. Unless it rains, we will go for a walk.
37. Unless I go on holiday, I will buy a bike.
38. Unless I have enough time, I won't visit them.