24 CONDITIONAL REVIEW: INTERMEDIATE
Complete with the correct forms of the verbs.
01. If you arrive early, you (have) to wait.
02. If you arrived early, you (have) to wait.
03. If you had arrived early, you (have) to wait.
04. They (help) you if they can.
05. They (help) you if they could.
06. They (help) you if they could have.
07. If you drink too much you (be) sick.
08. Unless you work hard you (not pass) your test.
09. If you stop smoking you (live) longer.
10. Practise hard and your English (improve).
11. We would have gone out if (stop) raining.
12. If I (go) away, I would have written to you.
13. If he (work) harder, he would have succeeded.
14. He not (write) unless he was lonely.
15. She would have come if you (invite) her.
16. Unless the greenhouse effect is mitigated, the seas (rise).
17. If you were older, you (be) wiser.
18. If I had known you weren't coming, I not (bake) a cake.
19. If you run, you (catch) the train.
20. If I were you, I (go) on holiday.