2. I'll do it if I have the time.
2. I would do if I had the time.
2. I would have done it if I had had the time.
3. If I see her, I'll tell her thisstory.
3. If I saw her, I would tell her the story.
3. If I had seen her, I would have told her the story.
4. If it is fine tomorrow, we shall go for a picnic
4. If it were fine tomorrow, we would go for a picnic
4. If it had been fine yesterday, we would have been gone for a picnic.
5. If you work on Sunday, I will pay you well.
5. If you worked on Sunday, I would pay you well.
5. If you had worked on Sunday, I would have paid you well.
6. If I finish the work this week, I will go on vacation.
6. If I finished the work this week, I would go on vacation.
6. If I had finished the work this week, I would have gone on vacation.
7. If it rains next week I shall plant the vegetables.
7. If it rained next week I would plant the vegetables.
7. If it had rained last week, I would have planted the vegetables.