Complete the exercise with If or Unless.

Meaning of if and unless

If

If means on (the) condition that, provided (that), providing (that), presuming (that), supposing (that), assuming (that), as long as...

Example:

If I am free this evening, I will watch the match.

Unless

Unless means except if.

Example:

You will feel cold unless you wear a warm jacket.

If and unless in conditional sentences

Both if and unless are used to introduce conditional sentences:

Conditional Sentence Type 1:

· If we don't hurry, we will be late for the show.

· Unless we hurry, we will be late for the show.

Conditional Sentence Type 2

· If he had permission from his parents, he would travel alone.

· Unless he had permission from his parents, he wouldn't travel alone.

Conditional Sentence Type 3

· If you hadn't suggested it, I wouldn't have phoned him.

· Unless you had suggested it, I wouldn't have phoned him.

Exercises

A. Complete the following sentences using if or unless:

1. ………………………………….. you don’t help me, I will be in real trouble. (if / unless)

2. ……………………………….. you invite her, she will not come. (if / unless)

3. ………………………………… there is an emergency, don’t disturb me. (if / unless)

4. ……………………………….. you don’t start now, you won’t reach there in time. (if / unless)

5. …………………………….. you don’t work hard, you will not win. (if / unless)

6. ……………………………….. I had known, I would have told you. (if / unless)

7. I will phone you ………………………………. I have time. (if / unless)

8. It would be nice ……………………………… you helped me a bit with the housework. (if / unless)

9. …………………………………….. you stop eating fatty foods, you will not lose weight. (if / unless)

10. ………………………………….. she pays up, we are going to be in real trouble. (if / unless)

B. Complete the exercise withIforUnless:

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

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

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

4. you practice your Russian, you can improve it quickly.

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

6. there is oxygen, fire cannot burn.

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

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

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

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

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

Answers | A

1. If you don’t help me, I will be in real trouble.

2. Unless you invite her, she will not come.

3. Unless there is an emergency, don’t disturb me.

4. If you don’t start now, you won’t reach there in time.

5. If you don’t work hard, you will not win.

6. If I had known, I would have told you.

7. I will phone you, if I have time.

8. It would be nice if you helped me a bit with the housework.

9. Unless you stop eating fatty foods, you will not lose weight.

10. Unless she pays up, we are going to be in real trouble.

Answers: | B

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.

Дата добавления: 2015-11-16