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.

find

Nếu tôi tìm thấy quyển sách, tôi sẽ đưa nó cho bạn

will get

Nếu anh ta làm việc chăm chỉ, anh ta sẽ được tăng lương

calls

Nếu Jack gọi, tôi sẽ nói chuyện với anh ta

will die

Các loài cây sẽ chết nếu chúng không nhận được đủ ánh sáng mặt trời và nước

28. you work hard, you'll pass your exam

29. I'll be on vacation next week, I won't be able to attend the meeting.

If you work hard,you will pass your exam

Since I’ll be on vacation next week,  I won’t be able to attend the meeting

1. If you don't do your exercises, you will fail the exam.
2. If you don't save some money, you won't be able to buy the house.
3. Unless you behave yourself, your parents will be very unhappy.

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

→ If you don't do your exercises, you will fail the exam

→ Unless you do your exercises, you will fail the exam.

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

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

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

→ Unless you behave yourself, your parents will be very unhappy

1->if you don't do your exercises , you will fail the exam

  ->unless you don't do your exercises , you will fail the exam

2if you don't  save some money , you won't able to buy the house

3unless you don't chave yourself , your parents will be very unhappy

drive

Nếu bạn lái xe cẩn thận, bạn sẽ không bị tai nạn

drive

Dịch: Nếu bạn lái xe cẩn thận, bạn sẽ không bị tai nạn.

If you drive carefully, you won't have any accidents.

Nếu bạn lái xe cẩn thận, thì bạn sẽ không gặp tai nạn

1B 2C 3B 4A

28. Work hard and you will pass your exam 
If you work hard, you will pass your exam.
29. I’ll be on vacation next week, so I won’t be able to attend the meeting
Since I'll be on vacation next week, I won't be able to attend the meeting.
30. If you don’t start working hard now, you won’t be able to pass the final test
Unless you start working hard now, you won't be able to pass the final test.
31. Someone should take this garbage dump soon
This garbage dump should be taken soon.

1. Write the second sentences so that it has a similar meaning to the first
28. Work hard and you will pass your exam 
If…you work hard, you'll pass your exam.
29. I’ll be on vacation next week, so I won’t be able to attend the meeting
Since I be on vacation next week,  I won't be able to attend the meeting.
30. If you don’t start working hard now, you won’t be able to pass the final test
Unless…you start working hard now, you'll not be able to pass the final test.
31. Someone should take this garbage dump soon
This garbage dump should be taken soon.

28. Work hard and you will pass your exam 
If you work hard, you will pass your exam.
29. I’ll be on vacation next week, so I won’t be able to attend the meeting
Since I'll be on vacation next week, I won't be able to attend the meeting.
30. If you don’t start working hard now, you won’t be able to pass the final test
Unless you start working hard now, you won't be able to pass the final test.
31. Someone should take this garbage dump soon
This garbage dump should be taken soon.

4 Unless you invite her, she won't go to the party

5 Unless you run, you won't be on time

6 If you don't pay the money, I will call the police

7 Unless you put on your coat, you will get a cold

8 Unless he stops smoking, he will have problems later 

9 If he doesn't know the news, he won't come back

10 Unless you help me, I won't give you that Beyonce'CD

rewrite the following sentences .

1 / study hard and you will pass the exam .

- if you study hard, you will pass the exam

2 , save some money or you won't able to buy the house .

- if you don't save some money, you won't able to buy the house.

3 , be good or your parents will be very unhappy .

- if you aren't good, your parents will be very unhappy

4 , do it carefully or you will feel sorry afterwards .

- if you don't do it carefully, you will feel sorry afterwards

5 , ask him first and he will offer to help .

- if you ask him first, he will offer to help

6 , be calm or you will make a wrong decision .

- if you aren't calm, you will make a wrong decision

7 , be careful or you will cut yourself with that knife .

- if you aren't careful, you will cut yourself with that knife

rewrite the following sentences .

1 / study hard and you will pass the exam .

- if you study hard, you will pass the exam..................

2 , save some money or you won't able to buy the house .

- if you save some money, you will be able to buy the house

3 , be good or your parents will be very unhappy .

- if you be good, your parents will be very happy

4 , do it carefully or you will feel sorry afterwards .

- if not do it carefully, you will feel sorry afterawards

5 , ask him first and he will offer to help .

- if you ask him first, he will offer to help

6 , be calm or you will make a wrong decision .

- if you not be calm, you will make a wrong decision

7 , be careful or you will cut yourself with that knife .

- if you not be careful, you will cutyourself with that knife

1 / study hard and you will pass the exam .

- if you study hard, you will pass the exam

2 , save some money or you won't able to buy the house .

- if you don't save some money, you won't able to buy the house.

3 , be good or your parents will be very unhappy .

- if you aren't good, your parents will be very unhappy

4 , do it carefully or you will feel sorry afterwards .

- if you don't do it carefully, you will feel sorry afterwards

5 , ask him first and he will offer to help .

- if you ask him first, he will offer to help

6 , be calm or you will make a wrong decision .

- if you aren't calm, you will make a wrong decision

7 , be careful or you will cut yourself with that knife .

- if you aren't careful, you will cut yourself with that knife