05. If you (watch) the kettle it (never boil).
06. If you (keep) right on you (get) there eventually.
07. Unless you (work) hard you (never get) anywhere.
08. If Mr. Jones (call) (tell) him I have gone to Siberia.
09. They (not do) it if they (not have) the time.
10. If he (want) to get up early he (have to go) to bed before midnight.
11. If you arrive early, you (have) to wait.
12. If you arrived early, you (have) to wait.
13. If you had arrived early, you (have) to wait.
14. They (help) you if they can. ...................................
15. They (help) you if they could.
16. They (help) you if they could have.
17. If you drink too much you (be) sick.
18. Unless you work hard you (not pass) your test.
19. If you stop smoking you (live) longer.
20. Practice hard and your English (improve).
05. If you (watch)watch the kettle it (never boil) will never boil.
06. If you (keep)keep right on you (get)will get there eventually.
07. Unless you (work)work hard you (never get)will never get anywhere.
08. If Mr. Jones (call)calls (tell)tell him I have gone to Siberia.
09. They (not do)won't do it if they (not have)don't have the time.
10. If he (want)wants to get up early he (have to go)will have to go to bed before midnight.
11. If you arrive early, you (have)will have to wait.
12. If you arrived early, you (have)would have to wait.
13. If you had arrived early, you (have) would have had to wait.
14. They (help)will help you if they can. ...................................
15. They (help)would help you if they could.
16. They (help)would have helped you if they could have.
17. If you drink too much you (be)will be sick.
18. Unless you work hard you (not pass)won't pass your test.
19. If you stop smoking you (live)will live longer.
20. Practice hard and your English (improve)will improve
