1. I will call him tomorrow if I get to know his telephone number.
2. I would call him now if I knew his telephone number.
3. I would have called him yesterday if I had known his telephone number.
4. I would call him now if I had not forgotten his phone number.
5. I will visit him next week if I am free.
6. I would visit him next week if I were free.
7. I will stay here longer if I am not so busy.
8. I would be out of town now if I had not received this letter.
9. I would stay here longer if I weren't so busy.
10. I would have stayed here longer last year if I hadn’t been so busy.
11. If I do not find him, I will leave a note.
12. If you had left me a note, I would have visited you yesterday.
13. I would apologize if I felt that I wasn't right. But I don’t feel that way.
14. We would not insist if the case were not urgent.
15. If you were more careful, you would not have mixed those two names.
16. He would have dealt with this problem himself if he had not fallen ill.
17. If he had not been ill, he would have solved yesterday's problem.
18. I would have gone to the cinema yesterday if I had liked to.
19. The work would have be spoiled if we had not taken immediate action.
20. If he had not let me down, I would have done the work in a week.
21. I would be very obliged to you if you could put off our meeting.
22. If I were you, I would try to behave better.
23. By next week, she would have read the most part of the book.
24. If I were you, I would not be so frank with him.
25. If I were you, I would not be waiting for him now. I would leave a note.
26. If I were you, I would have punished the boy yesterday.
27. He would have closed the window long ago.