. Choose the correct form of the verbs to make zero or first conditional sentences.. 1 If I see him, I (give) him a lift.

2 The table will break if you (sit) on it.

3 If he (eat) all that, he will be ill.

4 If I find your passport, I (telephone) you.

5 The police (arrest) him, if they catch him.

6 If he (read) in bad light, he will ruin his eyes.

7 Someone (steal) your car if you leave it unlocked.

8 What will happen if my parachute (not open)?

9 If he (wash) my car, I'll give him $10.

10 If she (need) a radio, she can borrow mine.

11 If you (not go) away, I'll call the police.

12 I'll be very angry if he (make) any more mistakes.

13 If he (be) late, we'll go without him.

14 She will be absolutely furious if she (hear) about this.

15 If you put on the kettle, I (make) some tea.

16 If you give my dog a bone, he (bury) it.

17 If we leave the car here, it (not be) in anybody's way.

18 He'll be late for the train if he (not start) at once.

19 If you come late, they (not let) you in.

20 If he (go) on telling lies, nobody will believe a word he says.