If / Unless Conditionals Answers

A. Complete the exercise with If or Unless.

 1. Unless you drive more carefully, you will have an accident.

 2. Unless you prune these trees, they won’t grow well.

 3. He’ll get lost unless someone shows him the way.

 4. If you practice your English, you can improve it quickly.

 5. If you don’t hurry, you’ll be late for school again.

 6. Unless there is oxygen, fire cannot burn.

 7. If you go to bed late, you’ll feel tired in the morning.

 8. My parents will be angry unless I pass my exams.

 9. You can’t travel abroad if you don’t have a passport.

10. You can’t watch TV unless you finish your homework.

11. Unless they lower the price, I won’t buy that computer.

B. Complete the exercise with If or When.

1. If I am late this evening, don’t wait for me.

2. If I don’t see you tomorrow, I will phone you.

3. Do you mind if I close the window?

4. When I get up in the morning I usually drink a cup of coffee.

5. Have something to eat. If you don’t eat now, you’ll be hungry later.

6. John is still at school. When he leaves, he wants to go to university.

7. Be careful! If you aren’t careful, you’ll fail.


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