Grammar: Conditionals.

CONDITIONAL SENTENCES:

1. If it rains, the boys      won't play  wouldn't play  would not have played    hockey.
2. If he      grow  grew  had grown    his own vegetables, he wouldn't have to buy them.
3. Jim      will see  would see  would have seen    whisky distilleries if he travelled to Scotland.
4. Would you go out more often if you      don't have to do  didn't have to do  hadn't had to do    so much in the house?
5. She wouldn't have yawned the whole day if she      doesn't stay up  didn't stay up  hadn't stayed up    late last night.
6. If you      wait  waited  had waited    a minute, I'll come with you.
7. If we arrived at 10, we      will miss  would miss  would have missed    Tyler's presentation.
8. We      will help  would help  would have helped    John if we'd known about his problems.
9. If they      use  used  had used    new batteries, their camera would have worked correctly.
10. If I could go anywhere, it      will be  would be  would have been    New Zealand.
11. If they left now, they(be) in London by lunchtime.
12. You(not fail) the exam if you'd studied a bit harder.
13. If we'd brought a map with us, we(not be) lost now.
14. I(not speak) to him again unless he apologises.
15. You can go to the party as long as you(come) home before midnight.
16. Had I known you were bringing your friends, I(prepare) more food.
17. Suppose your car broke down in the middle of nowhere, what(do)?
18. I'd go out tonight if I(not have to) work tomorrow.
19. If we meet at 9:30, we  (to have) plenty of time.
20. Lisa would find the milk if she  (to look) in the fridge.
21. The zookeeper would have punished her with a fine if she  (to feed) the animals.
22. If you spoke louder, your classmates  (to understand) you.
23. Dan  (to arrive) safe if he drove slowly.
24. You  (to have) no trouble at school if you had done your homework.
25. If you  (to swim) in this lake, you'll shiver from cold.
26. The door will unlock if you  (to press) the green button.
27. If Mel  (to ask) her teacher, he'd have answered her questions.
28. I  (to call) the office if I was/were you.

• http://learnenglishteens.britishcouncil.org/grammar/intermediate-grammar/conditionals
• https://www.englishclub.com/grammar/verbs-conditional.htm
• https://www2.estrellamountain.edu/faculty/stonebrink/ESL040/4_types_of_conditionals.htm

Conditional sentences 

There are four main kinds of conditionals:

• The Zero Conditional:
  (if + present simple, ... present simple)
  If you heat water to 100 degrees, it boils.
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• The First Conditional:
  (if + present simple, ... will + infinitive)
  If it rains tomorrow, we'll go to the cinema.
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• The Second Conditional:
  (if + past simple, ... would + infinitive)
  If I had a lot of money, I would travel around the world.
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• The Third Conditional
  (if + past perfect, ... would + have + past participle)
  If I had gone to bed early, I would have caught the train.
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Click here for conditional exercises