Unless you work harder, you will fail in the exam.
-> If you don't work harder, you will fail the exam. (cần j giới từ in nhỉ)

1 No girl in our class is as beautiful as Mary

2 It's very important to keep the environment clean

3 If you don't work harder, you will fail the last exam

1 mary is the most beautiful girl our class

no girl....in our class is as beautiful as mary.......

2 keeping the environment clean is very important

it's.......very important to keep the environment sclean.....

3 unless you work harder , you will fail the last exam

if you......work harder, you won't fail the last exam....

1. If you aren’t quiet, you will not understand the lesson.

2. If you study harder, you won’t fail the final exam.

3. If you don’t work harder, you won’t get high salary.

4. If you don’t practice speaking English every day, you can’t improve your English.

5. You can’t control the child, can you?

6. They hardly understood the problem, did they?

7. The children are looking forward to going to the circus.

8. Do you have any difficulty speaking English?

9. The browns have not painted the living room for two years.

10. He began studying English six years ago.

III. Rewrite the following sentences using Conditional sentences type 1:

9. Study harder and you will succeed.

If you study harder, you will succeed.

10. Keep silent and we'll understand.

If we keep silent, we'll understand.

11. Do exercise regularly and you'll be fit.

If you do exercise regularly, you'll be fit.

1. If you do morning exercise regularly, you will be fit. 

2. If you drive carefully, you will not have accidents.

3. If you work harder, you can improve your English

4.  If you practice your English regularly ,your English will be improved.

5. If you are careful, you will not break the vase.

6. If you don't work harder, you’ll get poor marks.

7.  If they work hard enough, they can pass the exam with flying colors.

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

 8. If she is lucky, she may get a good job. 

If she isn’t lucky, she may not get a good job. 

you will not pass the examination unless you work harder

You will pass the exam unless you work harder 

You/ pass/ examination/ unless/ work harder

-> You won't pass the examination unless you work harder.

Có thể chia đôi hoặc chia ba ....

1. Be quiet or you will not understand the lesson.

→ If you are not quiet, you will not understand the lesson.

2. Study harder and you will not fail the coming exam.

→ If you study harder, you will not fail the coming exam.

3. Work harder or you won’t get high salary.

→ If you don't work harder, you won’t get high salary.

4. Practice speaking English every day or you can’t improve your English.

→ If you practice speaking English every day, you can’t improve your English

5. The children like to walk in the rain.

→ The children enjoy walking in the rain.

→ The children are interested in walking in the rain.

6. I think surfing the Net is useful.

→ I find it useful to surf the Net.

7. I don’t think she broke the vase accidentally.

→ I think she didn't break the vase accidentally.

8. Watching TV consumes a lot of time.

→ Watching TV is a time-consuming activity.

9. Can’t you control the child?

→ You can't cotrol the child, can you?

10. “I don’t know anything about it,” he said.

→ He denied knowing anything about it.

11. Did they understand the problem?

→ They hardly understood the problem, did they?

12. He forced me to put my hands up and quickly searched through my pockets.

→ I was forced to put my hands up and quickly searched through my pockets.

13. “Don’t forget to phone the office,” she told him.

→ She reminded him to phone the office.

14. Mary will watch the film in three hours.

→ It will take Mary three hours to watch the film.

15. The children are excited about going to the circus.

→ The children are looking forward to going to the circus.

16. He is interested in reading detective books.

→ He enjoys reading detective books.

17. Do you find it difficult to speak English?

→ Do you have any difficulty speaking English?

18. My father needs 15 minutes to read “Tuoi Tre” newspaper every morning.

→ My father spends 15 minutes on reading “Tuoi Tre” newspaper every morning.

19. The floor was cleaned by Loan

→ Loan cleaned the floor.

20. The Browns last painted the living-room two years ago.

→ The Browns have painted the living room for 2 years.