1. We must leave now , or we will miss the plane

=> If we don't leave now , we will miss the plane

2. Be careful or you many fall

=> If you are careless , you may fall

3. Hurry up or we'll be late for the concert

=> If we don't hurry up , we will be late for the concert

4. Oủ sources of energy will soon end if we don't try to save them

=> Unless we try to save our sources of energy , it will soon end

5. You will catch a cold if you don's keep your feet dry

=> Unless you keep your feet dry , you will catch a cold

6. Unless we protect the envirmonent , we will destroy ourselves

=> If we don't protect the eviroment , we will destroy ourselves

7. If she is more hard - working , she will get low marks

=> Unless she isn't more hard-working , she'll get low marks

8. Unless he listens to his parents , he will fail

=> If he doesn't listen to his parents , he will fail

1. We must leave now , or we will miss the plane

=> If we don't leave now , we will miss the plane

2. Be careful or you many fall

=> If you are careless , you may fall

3. Hurry up or we'll be late for the concert

=> If we don't hurry up , we will be late for the concert

4. Oủ sources of energy will soon end if we don't try to save them

=> Unless we try to save our sources of energy , it will soon end

5. You will catch a cold if you don's keep your feet dry

=> Unless you keep your feet dry , you will catch a cold

6.If she doesn't work harder, she'll lose her job

=> Unless she works harder, she won't lose her job

7.We will cycle to school every day. We will keep fitter

If we cycle to school every day, we will keep fitter .

8. We will use recycled products. We will save money

If we use recycled products, we will save money.

đây là tiếng anh lớp 6 hỉ

16. Be careful or you 'll break the TV. 

A. If you aren't Careful, you'll break the TV. 

B. If you are Careful, you'll break the TV. 

C. If you aren't Careful, you won't break the TV. 

D. If you are careful, you break the TV. 

17. With their enough hard work, they can pass the examwith flying colors. 

A. If they don't work hard work enough, they can pass the exam with flying colors.

 B. If they don't work hard work enough, they can't pass the exam with flying colors. 

C. If they don't work hard work, they will pass the exam with flying colors. 

D. If they don't work hard work enough, they could pass the exam with flying colors. 

18. If you don't work hard,you will fail the exam A. Unless you don't work hard,you don't fail the exam

 B. Unless you don't Work hard,you will fail the exam

 C. Unless you work hard,you will fail the exam

 D. Unless you don't work hard,you won't fail the exam 19. She said to me : "I will have to leave the city tomorrow" 

A. She told me she would have to leave the city the following day. 

B. She told me she will have to leave the city the following day. 

C. She told me she would had to leave the city the following day. 

D. She told me she would has to leave the city the following day. 

20. Tom said to his mother: "May I go out with my friends, Mom?" 

A. Tomasked his mother for pemission going out with his friends. 

B. Tomasked his mother to pemission to go out with his friends. 

C. Tomasked his mother for pemission to going out with his friends. 

D. Tomasked his mother for pemission to go out with his friends.

1) It is late now; I don't think Ann will come to see us

-> I would be surprised if Ann came to see us.

2)We don't go on holiday because we don't have enough money

-> If we had enough money, we would go on holiday.

3) Do these exercises more carefully or you will fail the exams

-> Unless you do these exercises more carefully, you will fail the exams.

4) I do not know the answer so I can not tell you

-> If I knew the answer, I could tell you.

5) She can't apply for the job because she doesn't know French

-> If she knew French, she could apply for the job.

6) if she didn't come here now, we'd come back home

-> Unless she came here now, we'd come back home.

7) Be careful or you will not be able to get the job

-> Unless you are careful, you will be able to get the job.

8) The trees will die unless it rains soon

-> If it doesn't rains soon, the trees will die.

Rewrite these sentences to begin with an imperative+and , or +clause :

1. if you ask me nicely, i'll mend it for you

\(\Rightarrow\) Ask me nicely , and I'll mend it for you .

2.You might fall if you are not careful

\(\Rightarrow\) Be careful or you might fall .

3.If you don't take a taxi, you'll miss your train

\(\Rightarrow\) Take a taxi or you'll miss your train .

4.If you don't hurry, you'll be late

\(\Rightarrow\) Hurry up , or you'll be late .

5.If you listen carefully, you'll find the correct answer

\(\Rightarrow\) Listen carefully and you'll find the correct answer .

1study hard and you will pass the exam

if you study hard, you will pass the exam

2. be careful or you'll cut yourself with that knife.

if you are not careful, you'll cut yourself with that knife.

3. save some money or you won't able to bvuy the house

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

4. ask him first and he will offter to help

if you ask him first, he will offter to help

5. be calm or you'll make a wrong decision

if you aren't calm, you'll make a wrong decision

6. you sing well and everyone will clap their hands

if you sing well, everyone will clap their hands

1study hard and you will pass the exam

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

2. be careful or you'll cut yourself with that knife.

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

3. save some money or you won't able to bvuy the house

if.....you don't save some money , you won't be able to buy that house.....

4. ask him first and he will offter to help

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

5. be calm or you'll make a wrong decision

if.....you aren't clam, you'll make a wrong decision.......

6. you sing well and everyone will clap their hands

if.....you sing well, everyone will clap their hands..........

1/ You must go right now or I’ll be very angry.

1. If you aren't good, your parents will be very unhappy

2. If you don't do it carefully, you'll feel sorry afterwards

3. If you study hard, you will pass the exam

4. If you aren't careful, you'll cut yourself with that knife

5. If you save some money, you will able to buy that house

6. If you ask him first, he will offer to help

7. If you aren't calm, you'll make a wrong decision

8. If you sing well, everyone will clap their hands