II/
1. If today were Sunday, the pupils could go swimming.
2. If he had been here, he would have had a lot of fun.
3. If my brother has enough money, he will buy a bicycle.
4. If he had had time, he would have read this novel.
5. If she hadn't missed the bus, she wouldn't have been late.
6. If Peter studied hard, he could get good marks.
7. If my sister didn't have a terrible headache, she wouldn't be absent from her class.
8. If Windy had come, we wouldn't have cancelled the meeting.
9. If he hadn't been angry, he would have said something.
10. If he didn't have to study for his exam, he could go out.
11. If she weren't lazy, she could pass the exam.
12. If he pays me tonight, I will have enough money to buy a car.
13. If he didn't smoke too much, he could get rid of his cough.
14. If she weren't shy, she would enjoy the party.
15. If I get a work pemrit, I will stay for another month.
16. If he took some exercises, he wouldn't be unhealthy.
17. If I had the right change, we could get the ticket.
18. If you don't study hard, you won't pass the exam.
19. If you are impatient, you will make mistakes.
20. If I had eaten lunch, I wouldn't feel hungry now.
21. If I were you, I wouldn't buy it.
22. Unless they invite me, I won't come.
23. If he had revised all his lessons, he wouldn't have failed the exam.
24. If you walk to the park, it will take you 5 minutes.
25. If it rains, we'll stay at home.
26. If I were you, I would cut down on smoking right now.
27. If they were not poor, they could help us.
28. If she weren't shy, she would enjoy parties.
29. If he took some exercise, he would be healthy.
30. If I had seen the signal, I would had stopped.
31. If my father lends me a car, I can take you.
32. If he did his homework, he wouldn't be punished.
33. If he had enough time, he could help me.
34. If she took some exercise, she would not be overweight.
35. If he had a bicycle, he wouldn't go to class late.
36. If I were not bad at English, I could do homework.
37. If he practised speaking French, he would speak it fluently.
38. If it didn't snow heavily, the meeting couldn't be canccelled.
39. If it didn't rain, we would go.
40. If John didn't eat so many chips, he would not be fat.
III/
26. do -> would
27. have -> had
28. hasn't -> hadn't
29. wouldn't -> won't
30. would -> will
31. wouldn't break -> wouldn't have broken
32. hasn't -> hadn't
33. could built -> built
34. have able -> have been able
35. knew -> had known
36. has given -> had given
37. could -> would
