1.     Do your exercises or you will fail the exam.

=> If you don’t do your execises, you will fail the exam.

2.     Save some money or you won’t be able to buy the house.

=> If you don't save some money, you won’t be able to buy the house.

3.     Behave yourself or your parents will be very unhappy.

=> If you don't behave yourself, your parents will be very unhappy.

4.     Do it carefully or you’ll feel sorry afterwards.

=> If  you don't do it carefully, you’ll feel sorry afterwards.

5.     Ask him first or he won’t offer to help.

=> If you don't ask him first, he won’t offer to help.

6.     Be calm or you’ll make a wrong decision.

=> If you aren't came, you’ll make a wrong decision.

7. Be careful or you’ll cut yourself with that knife.

=> If you aren't careful, you’ll cut yourself with that knife.

8. Concentrate on your teacher’s lecture, or you won’t understand the lesson.

If you don't concentrate on your teacher’s lecture, you won’t understand the lesson.

9. They have to drive carefully; otherwise, they will have an accident.

If they don't drive carefully, they will have an accident.

10. Your sister must finish her homework, or she will be punished.

If your sister doesn't finish her homework,  she will be punished.

11. We should do exercises regularly so that we will be in good shape.

If we do exercises regularly, we will be in good shape.

12. Take part in outdoor activities, and you will widen your knowledge.

If you take part in outdoor activities,  you will widen your knowledge.

13. We should eat sensibly so that we won’t gain weight.

If we eat sensibly, we won’t gain weight.

14. You should study English well, and you will have many opportunities for good jobs.

If you study English well, you will have many opportunities for good jobs..

15. Your parents have to control their temper, or they will punish you severely.

If your parents don't control their temper, they will punish you severely.

1. Stop telling lies or no one will trust you anymore.

No one will trust you anymore if you don't stop telling lies

2. Pay attention to the teacher or you can’t understand the lessons.

If you don't pay attention to the teacher, you won't understand the lessons.

3. Go to bed early or you will be exhausted the next morning.

If you don't go to bed early, you will be exhausted the next morning.

4. Save money from now and you can reward yourself with a long vacation at the end of the year.

If you save money from now, you will reward yourself with a long vacation at the end of the year.

5. Read more books and you can broaden your knowledge.

 If you read more books, you will broaden your knowledge.

6. Brush your teeth often in order not to get toothache.

If you don't brush your teeth often, you will get a toothache.

7. Listen carefully or you won't know what to do.

If you don't listen carefully, you won't know what to do.

8. Unless you want to get sick, you should eat more healthily.

If you don't want to get sick, you should eat more healthily (mệnh đề chính dùng should nên ko cần will/won't nữa)

If you don't work harder, you will lose your job

If you don't pay attention to the teacher, you won't understand the lessons

If you don't go to bed early, you can't get up early the next morning

1 If you don't work harder, you will lose your job.

2 If you don't pay attention, you won't understand the lessons.

3 If you don't go to bed early, you can't get up early the next moring.

1. If you don't work harder, you'll lose your job.
2. If you don't pay attention to the teacher, you won't understand the lesson.
3. If you don't go to bed early, you won't get up early next morning.

1. Plastic food packaging causes plastic pollution. Food packaging can't be eaten.

(Bao bì thực phẩm bằng nhựa gây ô nhiễm nhựa. Bao bì thực phẩm không thể ăn được.)

If-clause first: If food packaging could be eaten, we would reduce plastic pollution.

(Nếu có thể ăn được bao bì thực phẩm, chúng ta sẽ giảm thiểu ô nhiễm nhựa.)

If-clause last: We would reduce plastic pollution if food packaging could be eaten.

(Chúng ta sẽ giảm ô nhiễm nhựa nếu có thể ăn được bao bì thực phẩm.)

2. We can't compost plastic. Plastic ends up in landfills and oceans.

(Chúng tôi không thể ủ nhựa. Nhựa cuối cùng ở trong các bãi rác và đại dương.)

If-clause first: If we can’t compost plastic, it will end up in landfills and oceans.

(Nếu chúng ta không thể ủ nhựa, cuối cùng nó sẽ ở các bãi rác và đại dương.)

If-clause last: If we couldn’t compost plastic, it would end up in landfills and oceans.

(Nếu chúng ta không thể ủ nhựa, nó sẽ kết thúc ở các bãi rác và đại dương.)

3. We use lots of energy and water to grow food. Scientists can't make food in their labs yet.

(Chúng ta sử dụng nhiều năng lượng và nước để trồng thực phẩm. Các nhà khoa học chưa thể tạo ra thực phẩm trong phòng thí nghiệm của họ.)

If-clause first: If scientists could make food in their labs, we wouldn't use lots of energy and water to grow food.

(Nếu các nhà khoa học có thể tạo ra thực phẩm trong phòng thí nghiệm của họ, chúng ta sẽ không sử dụng nhiều năng lượng và nước để trồng thực phẩm.)

If-clause last: We wouldn't use lots of energy and water to grow food if scientists could make food in their labs.

(Chúng ta sẽ không sử dụng nhiều năng lượng và nước để trồng thực phẩm nếu các nhà khoa học có thể tạo ra thực phẩm trong phòng thí nghiệm của họ.)

4. We use lots of plastic. There's lots of trash.

(Chúng ta sử dụng rất nhiều nhựa. Có rất nhiều rác.)

If-clause first: If we use less plastic, there will be less trash.

(Nếu chúng ta sử dụng ít nhựa hơn, sẽ có ít rác hơn.)

If-clause last: There will be less trash if we use less plastic.

(Sẽ có ít rác hơn nếu chúng ta sử dụng ít nhựa hơn.)

em đang gấp ạ em còn 12 phút nữa thôi ạ

1. One of the reason I didn’t phone you was that I was very busy.

If I hadn't  been very busy, I would have phoned you.

2. Unfortunately, I didn’t have an umbrella and so I got wet in the rain.

 If I hadn't been wet, I would have an umbrella.

3. Peter was very nervous and failed the driving test.

-> If Peter hadn't been very nervous, he wouldn't failed the driving test.

4. I didn’t take a taxi because I didn’t have any money on me.

-> If I had money, I could take a taxi.

5. Jack failed the driving test, so his parents didn’t buy him a car.

If Jack hadn't failed the driving test, his parent might buy him a car.

6. The weather yesterday was cold, so we couldn’t go swimming in the sea.

If the weather hadn't been cold, we could go swimming in the sea.

7. My uncle didn’t tell me the way to his office, so I got lost.

If my uncle had told me the way to his office, I couldn't  got  lost.

8. She wasn’t at the airport yesterday because she didn’t read the message carefully.

If she had read the message carefully, she would at the airport. 

9. Lucy hurt her foot because she dropped the old box on it.

If  she hadn't dropped the old box, she wouldn't hurt her foot.

10. You cut yourself because you used a sharp knife.

If you hadn't used a sharp kinife, you wouldn't   cut  yourself.

11. Victory didn’t celebrate her birthday yesterday, so I didn’t bring her flowers.

If   Victory had celebrated her birthday, I might bring her flowers.

12. We didn’t take the train to London because it didn’t arrive on time.

If  it had arrived on time, we would take the train to London.

13. Max didn’t give you the USB flash drive because he left his schoolbag behind.

If  he hadn't left his schoolbag behind, Max could give you the USB flash drive.

14. She failed the exam last year because she didn’t study hard.

If  she had study hard, she wouldn't failed the exam.

15. She wasn’t a musician, so she didn’t record a CD.

If  she had recorded  a CD, she would a musician.

1. One of the reason I didn’t phone you was that I was very busy.

If I hadn't  been very busy, I would have phoned you.

2. Unfortunately, I didn’t have an umbrella and so I got wet in the rain.

 If I hadn't been wet, I would have an umbrella.

3. Peter was very nervous and failed the driving test.

-> If Peter hadn't been very nervous, he wouldn't failed the driving test.

4. I didn’t take a taxi because I didn’t have any money on me.

-> If I had money, I could take a taxi.

5. Jack failed the driving test, so his parents didn’t buy him a car.

If Jack hadn't failed the driving test, his parent might buy him a car.

6. The weather yesterday was cold, so we couldn’t go swimming in the sea.

If the weather hadn't been cold, we could go swimming in the sea.

7. My uncle didn’t tell me the way to his office, so I got lost.

If my uncle had told me the way to his office, I couldn't  got  lost.

8. She wasn’t at the airport yesterday because she didn’t read the message carefully.

If she had read the message carefully, she would at the airport. 

9. Lucy hurt her foot because she dropped the old box on it.

If  she hadn't dropped the old box, she wouldn't hurt her foot.

10. You cut yourself because you used a sharp knife.

If you hadn't used a sharp kinife, you wouldn't   cut  yourself.

11. Victory didn’t celebrate her birthday yesterday, so I didn’t bring her flowers.

If   Victory had celebrated her birthday, I might bring her flowers.

12. We didn’t take the train to London because it didn’t arrive on time.

If  it had arrived on time, we would take the train to London.

13. Max didn’t give you the USB flash drive because he left his schoolbag behind.

If  he hadn't left his schoolbag behind, Max could give you the USB flash drive.

14. She failed the exam last year because she didn’t study hard.

If  she had study hard, she wouldn't failed the exam.

15. She wasn’t a musician, so she didn’t record a CD.

If  she had recorded  a CD, she would a musician.

1. One of the reason I didn’t phone you was that I was very busy.

If I hadn't  been very busy, I would have phoned you.

2. Unfortunately, I didn’t have an umbrella and so I got wet in the rain.

 If I hadn't been wet, I would have an umbrella.

3. Peter was very nervous and failed the driving test.

-> If Peter hadn't been very nervous, he wouldn't failed the driving test.

4. I didn’t take a taxi because I didn’t have any money on me.

-> If I had money, I could take a taxi.

5. Jack failed the driving test, so his parents didn’t buy him a car.

If Jack hadn't failed the driving test, his parent might buy him a car.

6. The weather yesterday was cold, so we couldn’t go swimming in the sea.

If the weather hadn't been cold, we could go swimming in the sea.

7. My uncle didn’t tell me the way to his office, so I got lost.

If my uncle had told me the way to his office, I couldn't  got  lost.

8. She wasn’t at the airport yesterday because she didn’t read the message carefully.

If she had read the message carefully, she would at the airport. 

9. Lucy hurt her foot because she dropped the old box on it.

If  she hadn't dropped the old box, she wouldn't hurt her foot.

10. You cut yourself because you used a sharp knife.

If you hadn't used a sharp kinife, you wouldn't   cut  yourself.

11. Victory didn’t celebrate her birthday yesterday, so I didn’t bring her flowers.

If   Victory had celebrated her birthday, I might bring her flowers.

12. We didn’t take the train to London because it didn’t arrive on time.

If  it had arrived on time, we would take the train to London.

13. Max didn’t give you the USB flash drive because he left his schoolbag behind.

If  he hadn't left his schoolbag behind, Max could give you the USB flash drive.

14. She failed the exam last year because she didn’t study hard.

If  she had study hard, she wouldn't failed the exam.

15. She wasn’t a musician, so she didn’t record a CD.

If  she had recorded  a CD, she would a musician.

1. One of the reason I didn’t phone you was that I was very busy.

If I hadn't  been very busy, I would have phoned you.

2. Unfortunately, I didn’t have an umbrella and so I got wet in the rain.

 If I hadn't been wet, I would have an umbrella.

3. Peter was very nervous and failed the driving test.

-> If Peter hadn't been very nervous, he wouldn't failed the driving test.

4. I didn’t take a taxi because I didn’t have any money on me.

-> If I had money, I could take a taxi.

5. Jack failed the driving test, so his parents didn’t buy him a car.

If Jack hadn't failed the driving test, his parent might buy him a car.

6. The weather yesterday was cold, so we couldn’t go swimming in the sea.

If the weather hadn't been cold, we could go swimming in the sea.

7. My uncle didn’t tell me the way to his office, so I got lost.

If my uncle had told me the way to his office, I couldn't  got  lost.

8. She wasn’t at the airport yesterday because she didn’t read the message carefully.

If she had read the message carefully, she would at the airport. 

9. Lucy hurt her foot because she dropped the old box on it.

If  she hadn't dropped the old box, she wouldn't hurt her foot.

10. You cut yourself because you used a sharp knife.

If you hadn't used a sharp kinife, you wouldn't   cut  yourself.

11. Victory didn’t celebrate her birthday yesterday, so I didn’t bring her flowers.

If   Victory had celebrated her birthday, I might bring her flowers.

12. We didn’t take the train to London because it didn’t arrive on time.

If  it had arrived on time, we would take the train to London.

13. Max didn’t give you the USB flash drive because he left his schoolbag behind.

If  he hadn't left his schoolbag behind, Max could give you the USB flash drive.

14. She failed the exam last year because she didn’t study hard.

If  she had study hard, she wouldn't failed the exam.

15. She wasn’t a musician, so she didn’t record a CD.

If  she had recorded  a CD, she would a musician.

Ex 1 : Viết lại câu dưới dạng câu điều kiện 

1. You won’t lose weight if you eat so much,

  If you didn't eat so much, you would lose weight.

2. Hurry up or you will be late for the last train.

  If you don't hurry up, you will be late for the last train.

3. I will feel relaxed this weekend if I finish all my work by next Friday.

  I won’t feel relaxed this weekend if I don't finish all my work by next Friday.

4. If you don’t deal with your stress, your health will suffer.

Unless you deal with your stress, your health will suffer.

5. Stress hormones will stay in your body if you don’t do some exercise.

Unless you do some exercise, stress hormones will stay in your body.

6. You will feel very stressed if you don’t try to relax.

 You will feel very stressed unless you try to relax.

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

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

8. Don’t go out in the rain because you’ll get wet.

If you go out in the rain, you’ll get wet.

9. I won’t enjoy the film if you aren’t with me.

 Unless you are with me, I won’t enjoy the film

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

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

11. You should take a map because you might get lost in those mountains.

 In case you get lost in those mountains, you should take a map.

12. If Joe doesn't change his ways, he will end up in prison.

 Unless Joe changes his ways, he will end up in prison.

13. If he doesn't work harder, he'll lose his job.

 Unless he works harder, he'll lose his job.

14. Joan will stay on at school unless she finds a good job before September.     

 If Joan doesn't find a good job before September, she will stay on at school.     

15. Unless someone has a key, we can't get into the house.

 We can not get into the house if someone doesn't have a key.

16. I’ll call the teacher if you don’t leave me alone.

 Unless you leave me alone, I’ll call the teacher.

17. When you ask me for the car, I will lend it to you.

 Unless you ask me for the car, I will not lend it to you.

18. Don’t go out in the rain because you will get wet.

 If you go out in the rain, you will get wet.

19. Walk faster or you will miss the bus.

 If you don't walk faster, you will miss the bus.

20. I won’t enjoy the film if you aren’t with me.

 Unless you are with me, I won’t enjoy the film.

21. You must leave home early or you will miss the flight

 If you don't leave home early, you will miss the flight.

22. John will pass the driving exam if he isn’t nervous

 Unless John is nervous, he will pass the driving exam.

23. They will go on holiday if they have time.

 Unless they have time, they won't go on holiday.

24. You have to get up early or you will be late for school.

 If you don't get up early, you will be late for school.

25. I'll only help you if you promise to try harder.

 Unless you promise to try harder, I won't only help you.

26. He will take a taxi if it rains.

 Unless it rains, he won't take a taxi.

27. Unless he phones immediately he won't get any information.

 If he doesn't phone immediately, he won't get any information.

1 Leave me alone or I'll call the police

If you don't leave me alone, I'll call the police

Unless you leave me alone, I'll call the police

2 He helps me so I'm successful

If he didn't help me, I wouldn't be successful

Unless he helped me, I wouldn't be successful

3 Because they are late, they can't get a seat

If they weren't late, they could get a seat

Unless they were late, they could get a seat 

4 Give me some money and I'll let you go

If you give me some money, I'll let you go

Unless you give me some money, I'll not let you go

5 Stay here on you'll get wet

If you don't stay here, you'll get wet

Unless you stay here, you'll get wet

Viết lại câu, sử dụng câu điều kiện loại 1: 1, Don't go to school late or you will be punished by the teacher.

=>...If you don't go to school late , you won't be punished by the teacher.

=>....If you go to go to school late , you will be punished by the teacher.

2, See will pay me tonight, I will have money to buy a car.

=>...If See will pay me tonight, I will have money to buy a car

3, Be careful or you will fall down.

=>...If you don't be careful , you will fall down.

=>.....If you be careful , you won't fall down.

1. If he takes exercises, he will be healthy.

2. If I had money, we could get the ticket.

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

1. if he took exerciese he would be healthy 

2. if you study hard, you won't pass the exam 

3.If we couldn't got the ticket because I don’t have money.

1 if he takes exercises, he will be healthy

2 If I have money, we can get the ticket

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