Exercise 3: Choose the most suitable one (A, B, C, or D).

1. A. calls

2. B. if it rains

3. В. If 

4. C. what would you do 

6. A. will need

7. D. were / would apply

7. A. unless

8. D. had taken / would be

9. C. had had / would have finished

10. D. rains

11. A. Were our father 

12. B. Had Peter driven 

13. A. If I had 

14. D. would have had / had passed

15. C. Should Mr. Jones call

16. A. Unless 

17. B. or 

18. A. or you will make 

19. B. But for they had had good preparations

20. C. were / would you do

Exercise 4: Choose the most suitable one (A, B, C, or D).

1. A. will give

2. C. in case 

3. A. unless

4. D. were / would take

5. B. What would you do

6. B. knew

7. A. Providing

8. B. will not have to change

9. B. had rained / would be 

10. A. tell

11. C. Unless we had had

12. A. Were I

13. D. had rained / would not be

14. D. would not have got

15. B. Should I need 

16. A. Had I known 

17. B. Were I 

18. D. unless 

19. C. or

20 C. Unless 

(Cấu trúc các loại câu điều kiện

If + S + V(s,es), S+ V(s,es)/câu mệnh lệnh

If + S + V(s,es), S + Will/Can/shall…… + V

If + S + V2/ Ved, S +would/ Could/ Should…+ V

If + S + Had + V(pp)/Ved, S + would/ could…+ have + V(pp)/Ved

If + S + had + V3/Ved, S + would + V)