Put the verbs in brackets into the correct tenses.
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.
21 Unless he (sell) more, he won't get much commission.
22 If I lend you $10, when you (repay) me?
23 We'll have to move upstairs if the river (rise) any higher.
24 If he (work) hard today, can he have a holiday tomorrow?
25 Ice (turn) to water if you heat it.
26 If the house (burn) down, we can claim compensation.
27 If you (not like) this one, I'll bring you another.
28 Unless you are more careful, you (have) an accident.
29 Tell him to ring me up if you (see) him.
30 If I tell you a secret, you (promise) not to tell it to anyone else?
31 If you (not believe) what I say, ask your mother.
32 If he (like) the house, will he buy it?
33 If you kindly sit down, I (make) enquiries for you.
34 Unless I have a quiet room, I (not be able) to do any work.
35 She won't open the door unless she (know) who it is.
36 Should you require anything else, please (ring) the bell for the attendant.

1 If I see him, I WILL GIVE him a lift.2 The table will break if you SIT on it.3 If he EATS all that, he will be ill.4 If I find your passport, I will telephone you.5 The police WILL ARREST him, if they catch him.6 If he READS in bad light, he will ruin his eyes.7 Someone WILL STEAL your car if you leave it unlocked.8 What will happen if my parachute DOES NOT OPEN? 9 If he WASHES my car, I'll give him $10.10 If she NEEDS a radio, she can borrow mine.11 If you DO NOT GO away, I'll call the police.12 I'll be very angry if he MAKES any more mistakes.13 If he IS late, we'll go without him.14 She will be absolutely furious if she HEARS about this.15 If you put on the kettle, I WILL MAKE some tea.16 If you give my dog a bone, he WILL BURY it.17 If we leave the car here, it WON'T BE in anybody's way.18 He'll be late for the train if he DOESN'T START at once.19 If you come late, they WON'T LET you in.20 If he GOES on telling lies, nobody will believe a word he says.21 Unless he SELLS more, he won't get much commission.22 If I lend you $10, when WILL you REPAY me?23 We'll have to move upstairs if the river RISES any higher.24 If he WORKS hard today, can he have a holiday tomorrow?25 Ice TURNS to water if you heat it. 26 If the house BURNS down, we can claim compensation.27 If you DON'T LIKE this one, I'll bring you another.28 Unless you are more careful, you WILL HAVE an accident.29 Tell him to ring me up if you WILL SEE him.30 If I tell you a secret,  WILL you  PROMISE not to tell it to anyone else?31 If you DON'T BELEIVE what I say, ask your mother.32 If he LIKES the house, will he buy it?33 If you kindly sit down, I WILL MAKE enquiries for you.34 Unless I have a quiet room, I WON'T BE ABLE to do any work.35 She won't open the door unless she KNOWS who it is.36 Should you require anything else, please RING the bell for the attendant.