1. If I see him, I (give) him a gift.
--> will give
2. If I had a typewriter, I (type) it myself.
--> would type
3. If I had known that you were in hospital, I (visit) you.
--> would have visited
4. You could make better progress if you (attend) class regularly.
--> attended
5. If I (know) his telephone number, I'd give it to you.
--> knew
6. If you (arrive) ten minutes earlier, you would have got a seat.
--> had arrived
7. He could get a job easily if he (have) a degree.
--> had
8. I shouldn't have believed it if I (not see) it with my own eyes.
--> don't see
9. If she (study) hard, he can pass the exam.
--> studies
10. If she had asked you, you (accept)?
--> would have accepted
11. Rice plants (grow) well if there is enough rain.
--> grows
12. He might get fat if he (stop) smoking.
--> stops
13. What you (do) if you found a burglar in your house?
--> would you do
14. If she (not hurry), she may be late.
--> doesn't hurry
15. If I (try) again, I think that I would have succeed.
--> had tried
16. Water (not run) downhill if there were not gravity.
--> didn't run
17. If I tell you a secret, you (promise) not to tell it to anyone else?
-->will promise
18. Tell him to ring me if you (see) him.
--> see
19. The police (arrest) him if they catch him.
--> will arrest
20. If you (speak) more slowly, he might have understood you.
--> had spoken