Complete the following sentences using if or unless.
1. I cannot go ……………………. he gives me permission.
a) if
b) unless
2. We cannot live ……………………. we do not eat.
a) if
b) unless
3. ………………………. the rain stops, we will go out.
a) If
b) Unless
4. ……………………… I had enough money, I would buy a car.
a) If
b) Unless
5. …………………….. he expresses regret, he will not be allowed to enter the class.
a) If
b) Unless
6. He would be very happy ………………….. you invited him.
a) if
b) unless
7. You won’t get better ………………………. you stop smoking.
a) if
b) unless
8. He will become the chief minister ……………………. his party wins majority.
a) if
b) unless
9. You will fall ill …………………….. you expose yourself to the cold wind.
a) if
b) unless
10. He won’t be promoted ……………………… he wins the confidence of his manager.
a) if
b) unless
Answers
1. I cannot go unless he gives me permission.
2. We cannot live if we do not eat.
3. If the rain stops, we will go out.
4. If I had enough money, I would buy a car.
5. Unless he expresses regret, he will not be allowed to enter the class.
6. He would be very happy if you invited him.
7. You won’t get better unless you stop smoking.
8. He will become the chief minister if his party wins majority.
9. You will fall ill if you expose yourself to the cold wind.
10. He won’t be promoted unless he wins the confidence of his manager.
