1. If I have enough free time, I will help my mum with the housework.
2. If you stop talking, you will understand the lesson.
3. If I apply for a job, I will apply for a foreign company.
4. If my father earns much money, life will easy for us.
5. If you pay attention to what the teacher says, you won't be punished.
6. If I have my camera with me, I can take a picture of Alex standing on his head.
7. If you don't get up, you will be late for school.
8. If her mother here, the child won't cry.
9. If I have enough money, I can buy this dress.
10. If we're stay in the same hotel, we can share a room.

21. Go right now or you’ll be late for the train.

If you don't go right now, you'll be late for the train.

22. Stop talking or you won’t understand the lesson.

If you don't stop talking, you won't understand the lesson.

23. I didn’t turn left at the station, and I lost my way.

If had turn left at the station, I wouldn't have lost my way.

24. Carol didn’t answer the phone because she was studying.

If Carol hadn't been studying, she would have answered the phone.

25. Jack was late to the meeting because his watch was slow.

If Jack's watch hadn't been slow, he wouldn't have been late to the meeting.

27. I didn’t realize you were tired when I asked you to go for a walk.

If I had realized you were tired, I wouldn't have asked you to go for a walk.

28. The wind is blowing hard, so we won’t take the boat out for a ride.

If the wind wasn't blowing hard, we would take the boat for a ride.

29. Martin failed his driving test last week because he was very nervous.

If Martin hadn't been very nervous, he wouldn't have failed his driving test.

30. I was able to buy the motorbike because Jim lent me the money.

If Jim hadn't lent me the money, I wouldn't have been able to buy the motorbike.

31. Because I don’t have enough free time, I can’t help my mother with the housework.

If I had enough free time, I could help my mother with the housework.

32. The schoolchildren sowed some seeds, but they forgot to water them so they didn’t grow.

If the children hadn't forgot to water some seeds, they would have grown.

33. Paulo is working on two jobs right now, so he doesn’t have time to help you with your remodeling.

If Paulo wan't woking on two jobs right now, he would have time to help you with your remodeling.

34. Sally doesn’t know what she has to do for homework because she was absent from school on Friday.

If Sally hadn't been absent from school on Friday, she would know what she has to do for homework.

35. Olga and Ivan weren’t paying attention, so they didn’t see the sign marking their exit from the highway.

If Olge and Ivan had been playing attention, they would have seen the sign marking thier exit from the highway.

1.If you don't keep quiet, you will wake the baby.

2.If you keep talking, you won't understand the lesson.

3.If you throw garbage in the river, the water will be polluted.

4. If I knew her number, I would have called her.

5.If I knew the answer, I would tell you.

6.If the water is too dirty, the fish will die.

7.If we don't have a map, we will get lost.

8. If Susan eats four cakes, she will get sick.

9.If the weather wasn't good, we wouldn't have had a picnic.

10.If we keep the water clean, we will have enough water to use in the future.

11.If Peter eats too many sweet potatoes, he might get fat.

12.If you water regularly the plant will grow well.

13. If you don't finish your homework, you won't be able to go out tonight.

14.If they go out, they will help me.

15.If he practices more, he will be able to win the game.

VI.  Make conditional sentences:

1. Keep silent or you’ll wake the baby up.

→ If you don't keep silent, you will wake the baby up.

2. Stop talking or you won’t understand the lesson.

→ If you don't stop talking, you won't understand the lesson.

3. I don’t know her number, so I don’t ring her up.

→ If I knew her number, I would ring her up.

4. I don’t know the answer, so I can’t tell you.

→ If I knew the answer, I could tell you.

5. We got lost because we didn’t have a map.

→ If we had a map, we wouldn't have gotten lost.

6. Susan felt sick because she ate four cream cakes.

→ If Susan hadn't eaten four cream cakes, she wouldn't have felt sick.

8. He lost his job because he was late every day.

→ I couldn't find sentence 7 in the previous search results.

9. Peter is fat because he eats so many chips.

→ If Peter didn't eat so many chips, he wouldn't be fat.

10. Robert got a bad cough because he started smoking cigarettes.

→ If Robert hadn't started smoking cigarettes, he wouldn't have gotten a bad cough.

VII. Rewrite the following sentences:

1. He can’t go out because he has to study for his exam.

→ If he didn't have to study for his exam, he could go out.

2. She is lazy so she can’t pass the exam.

→ If she weren't lazy, she could pass the exam.

3. He will pay me tonight; I will have enough money to buy a car

→ If he pays me tonight, I will have enough money to buy a car.

4. He smokes too much; that’s why he can’t get rid of his cough.

→ If he didn't smoke too much, he could get rid of his cough.

5. She is very shy, so she doesn’t enjoy the party.

→ If she weren't so shy, she would enjoy the party.

6. I will get a work permit. I will stay for another month.

→ If get a work permit, I will stay for another month.

7. He doesn’t take any exercises. He is so unhealthy

→ If he took exercises, he wouldn't be so unhealthy.

8. We can’t get the ticket because I don’t have the right change.

→ If I had the right change, we could get the ticket.

9. Study hard or you won’t pass the exam.

→ If you don't study hard, you won't pass the exam.

10. Don’t be impatient or you will make mistakes.

→ If you are patient, you won't make mistakes.

11. I didn’t eat lunch, I feel hungry now.

→ If I I had eaten lunch, I wouldn't feel hungry now.

12. I only come if they invite me.

→ Unless they invite me, I only come.

13. He didn’t revise all his lessons, he failed the exam.

→ If he had revised all his lessons, he wouldn't have failed the exam.

14. The park is over there, only 5 minutes’ walk.

→ If you walk, the park is only 5 minutes away.

15. Leave me alone or I’ll call the police.

→ Unless you leave me alone, I will call the police.

16. If you arrive at the office earlier than I do, please turn on the air-conditioner.

→ Should you arrive at the office earlier than I do, please turn on the air-conditioner.

17. The children don’t go to school in the snowy weather.

→ If it snows, the children don't go to school.

18. He died so young; otherwise, he would be a famous musician by now.

→ Had he not died so young, he would be a famous musician by now.

19. You must tell me the whole truth or I won’t help you.

→ Unless you tell me the whole truth, I won't help you.

20. The car breaks down so often because you don’t take good care of it.

→ Were I taking good care of it, the car wouldn't break down so often.

21. He is very bad-tempered, that’s why his wife left him soon after marriage.

→ If he weren't so bad-tempered, his wife wouldn't have left him soon after marriage.

22. Don’t tell lies to your boss or you’ll be fired at once.

→ If you tell lies to your boss, you'll be fired at once.

. Stop talking or you won’t understand the lesson.
→ If__you don't stop talking, you won’t understand the lesson._____
24. I don’t know her number, so I don’t ring her up.
→If__I knew her number, I would ring her up___
25. I don’t know the answer, so I can’t tell you.
→ If _I knew the answer, I would tell you_
26. We got lost because we didn’t have a map.
→ If __we had got a map, we wouldn't have lost_______
27. Susan felt sick because she ate four cream cakes.
→___If Susan hadn't eaten four cream cakes, she wouldn't have felt sick__
28. Without this treatment, the patient would have died.
→__If it hadn't been for this treatment, the patient would have died.___
29. He lost his job because he was late every day.
→__If he hadn't been late every day, he wouldn't have lost his job__
30. Peter is fat because he eats so many chips.
→____If Peter didn't eat so many chips, he wouldn't be fat___
31. Robert got a bad cough because he started smoking cigarettes.
→ If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough

23. If you don't stop talking, you won't understand the lesson.

24. If I don't know her number, I won't ring her up.

25. If I don't know the answer, I won't tell you.

26. If we don't have a map, we will get lost.

1.Keep silent or you’ll wake the baby up.

→ If you don't keep silent, you'll wake the baby up

2. Stop talking or you won’t understand the lesson. →If you don't stop talking, you won't understand the lesson

3. I don’t know her number, so I don’t ring her up. →If I knew her number, I would ring her up

4. I don’t know the answer, so I can’t tell you. → If I knew the answer, I would tell you

5. We get lost because we don’t have a map.

→ If we had a map, we wouldn't get lost

6. He loses his job because he is late every day. → If he wasn't late every day, he wouldn't lose his job

7. Peter is fat because he eats so many chips. → If Peter didn't eat so many chips, he wouldn't be fat

8. Robert got a bad cough because he started smoking cigarettes. → If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough

1. Because they drive carelessly, they get some problems
-> If_______they didn't drive carelessly, they wouldn't get some problems____________
2. Keep quiet or I'll scream.
-> If _________you don't keep quiet, I'll scream___________
3. We don't have enough money, so we don't buy those new comics
-> If __________we had enough money, we would buy those new comics___________
4. Stop talking or you won't understand the lesson
-> If ___________you odn't stop talking, you won't understand the lesson___________
5. She is not free today, that's why she can't go to the movie with her friend
-> If__________she were free today, she could go to the movie with her friend______________
6. Water these plants or they will die.
-> If____________you don't water these plants, they'll die______________
7. He is so lazy, so he fails in the final exam
-> If ______________he weren't so lazy, he wouldn't fail in the final exam_____________
8. Because the weather is not fine, the children don't play out door
-> If ________________the weather were fine, the children would play out door______________
9. Go right now or you'll be late for the train
-> If ____________you don't go right now, you'll be late for the train_________________
10. She doesn't play tennis because she is very old
-> If____________she weren't very old, she would play tennis_____________

If you don't keep silent, you will wake the baby up

If you talk more, you won't understand the lesson

Unless she hurries, she won't be late

Unless you are careful, you will cut yourself

If she whispers, everyone won't know what she is saying

If you eat more vegetables, you will be healthier

If you don't pay the water bill today, your clean water will be cut off

If you don't stop smoking, your cough may be worse

If we use less fosil fuel, they won't be run out soon

Exercise 2: Make conditional sentences:

1.      Keep silent or you’ll wake the baby up.

2.       →If  keep silent, you’ll wake the baby up.

3.      Stop talking or you won’t understand the lesson.

→ If stop talking, you won’t understand the lesson.

2.      If she does not hurry, she’ll be late

Unless she hurries, she’ll be late

3.      If you are not careful, you’ll cut yourself

Unless you careful, you’ll cut yourself

5. Unless she whispers, everyone knows what she is saying.

If she doesn't whispers, everyone knows what she is saying.

6. Eat more vegetables and you will be healthier

If Eat more vegetables, you will be healthier

7. Pay  clean water  bill today or your  clean water will be cut off.

If Pay  clean water  bill today, your  clean water will be cut off.

8. Stop smoking otherwise your cough may be worse.

If stop smoking otherwise, your cough may be worse.

9. Unless we use less fossil fuel, they will be run out soon.

If we don't use less fossil fuel, they will be run out soon.

1.      Keep silent or you’ll wake the baby up.

2.       →If  …you don't keep silent , you’ll wake the baby up. …………..…..………

3.      Stop talking or you won’t understand the lesson.

→ If ……you don't stop talking,you won’t understand the lesson.….

2.      If she does not hurry, she’ll be late

Unless …she hurry,she'll be late…………………………………………….

3.      If you are not careful, you’ll cut yourself

Unless …you are careful,you’ll cut yourself………………

5. Unless she whispers, everyone knows what she is saying.

If ...she doesn't whisper ,everyone knows what she is saying.

.......................................................................................................

6. Eat more vegetables and you will be healthier

If .......you eat more vegetables,you will be healthier.........................................

7. Pay  clean water  bill today or your  clean water will be cut off.

If .............you don't pay clean water  bill today ,your  clean water will be cut off..........................

8. Stop smoking otherwise your cough may be worse.

If .......you don't Stop smoking ,your cough may be worse........................

9. Unless we use less fossil fuel, they will be run out soon.

If .......we don't we use less fossil fuel, they will be run out soon.......................................