1.If you don't work hard, you won't pass the exam.

2.If Harry fails his examination, his parents will be sad.

3.If Sue goes out this weekend, she won't have time to study.

4.If it snows tomorrow, I will go skiing.

5.If engineers don't get enough sleep, they will make a series of mistakes.

6.If you aren't careful, you may fall off your horse.

7.If more people cycle every day, there will be less air pollution.

1, If you don't study hard, you will fail the exam

=> If you study hard, you won't fail the exam

2, If you don't work hard, you will fail the examination

=> If you work hard, you won't fail the examination

3, If you don't water flowers, they will die

=> If you water flowers, they won't die

4, If we don't keep the environment clean, we won't have an ideal place to live 

=> If we keep the environment clean, we will have an ideal place to live

5, If you get up early, you won't be late for school

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

1. Study hard or you will fail the exam.

→ If you don't study hard, you will fail the exam.

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

2. Work hard or you won’t pass your examination.

→ If you don't work hard, you won't pass your examination.

→ If you work hard, you will pass your examination.

3. Water flowers or they will die.

→ If you don't water flowers, they will die

→ If you water flowers, they won't die.

4. Keep the environment clean or we won’t have an ideal place to live.

→ If we don't keep the environment clean, we won't have an ideal place to live

→ If we keep the environment clean, we will have an ideal place to live.

5. Get up early or you’ll be late for school.

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

→ If you get up early, you won't be late for school.

* Nhìn chung thì đây là những câu điều kiện loại 1 cơ bản. Mình cho khẳng định và phủ định làm thành 2 dạng câu.

* Cấu trúc:

- Câu điều kiện loại 1: If + Present simple, S + will/can + V (bare)

- Câu điều kiện loại 2: If + Past simple, S + would/could + V (bare)

- Câu điều kiện loại 3: If + Past perfect, S + would have + VPII

1. If we work hard, we will pass the exam.

2. If you play with the matches, you will hurt yourself.

3. It's fun to learn about recycling.

4. Why don't we write about the three Rs ?

5. If you provoke the monkey, it will attack you.

6. If we reusable bags for shopping, we will help the environment.

7. How about planting more trees and flowers ?

8. What a beautiful and clean school !

1. If we work hard, we will pass the exam 

2. If you play with the matches, you will hurt yourself.

3. It's fun to learn about recycling.

4. Why don't we write about the three Rs?

5. If you provoke the money , it will attack you.

6. If we use reusable bags for shopping, we will help the environment.

7. How about planting more trees and flowers?

8. What a beautiful and clean school !

1, If we don't hurry up, we will be late for the bus

2, If you don;t study harder, you won't pass the exam 

3, If  we talk in class, we won't understand what the teacher is explaning

4, If you aren't carefull, you will break the flower vase

5, I will call the police if you don't give my cycle back

6, Unless you don't give my bicycle back, i will call the police

7, If you don't study harder, , you will fail the next exam 

8, If we aren't hurry up, we will late for the concert

9, If it doesn't stop ranning, we won't go out

10, UNless Joe change his way, he will end up in príon

1. Hurry up, or we will be late for the bus.

" If we ………………don't hurry up, we will be late for the bus……………………………………………………………………………

2. Study harder, or you won’t pass the final exam.

" If you ………………don't study harder, you won't pass the final exam……………………………………………………………………………

3. Don’t talk in class, or you won’t understand what the teacher is explaining.

" If we ………………talk in class, we won’t understand what the teacher is explaining. ……………………………………………………………………………

4. Be careful, or you will break the flower vase.

" If ….…………………………you are not careful, you will break the flower vase…………………………………………………………………

5. Give me the bicycle back, or I will call the police

" I will.…………………call the police if you do not give me the bicycle back…………………………………………………………………………

6. I’ll call the police if you don’t give back my bicycle. (Unless = If …. not)

→ Unless ……………you give back my bicycle, I will call the police……………………………………………………………………………

7. Study harder or you will fail in the next exams.

→ If ……………………you do not study harder, you will fail in the next exams…………………………………………………………………………

8. Hurry up or we’ll be late for the concert.

→ If ……………………you do not hurry up , we will be late for the concert…………………………………………………………………………

9. We won’t go out unless it stops raining.

→ If ………………………it does not stop raining, we will not go out………………………………………………………………………

10. If Joe doesn’t change his way, he will end up in prison.

→ Unless ………………Joe changes his way, he will end up in prison…………………………………………………………………………

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.

1.Work hard and you will pass the Entrance examination 10

            If……you work hard, you will pass the Entrance examination 10………

                  2.Hurry up or you will not catch the first bus

            If …you don't hurry up, you will not catch the first bus………

  3.Recycle and we will save natural resources

            If …we recycle, we will save natural resources……

                   4. You should call the tourist agency. They will explain to you more clearly

            If …you call the tourist agency, they will explain to you more clearly ……

                   5. Unless she feels better, she won’t go to school tomorrow

             If …she feels better, she will go to school tomorrow………

                    6.If you don’t rest, you really will be ill

             Unless……you rest, you really will be ill……

                    7.Start at once or you will be late for school.

             If …you don't start at once, you will be late for school……………

8.I may have free time tomorrow. I’ll go out with you.

               If ……I have free time tomorrow, I’ll go out with you.…………

9.Be calm and everything will be all right.

               If …you are calm, everything will be all right…

10.Students don’t litter and our school yard is clean.

               If ……students don't litter, our school yard will be clean…………

Rewrite the sentences without changing the meaning.

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 would 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 would  get rid of his cough

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

→ If she weren’t shy, she could enjoy the party.

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

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

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

→ If he didn’t take any exercises, he is so unhealthy

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

→ If I had the right change,we could get the ket

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

→ If you study hard, you would pass the exam

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

→ If you are impatient, you will make mistakes.

1. The river which flows through Ho Chi Minh City is the Sai Gon River.

2. Mr Phong who is supposed to be at the meeting hasn’t come yet.

3. Our solar system is in a galaxy which is called the Milky Way.

4. I come from a city which is located in the southern part of the country.

5. I’ve recently gone back to the town where I was born.

6. Do you know the name of the hotel where John is staying?

7. There are some words which are very difficult to translate.

8. What is the name of the man whose car you borrowed?

9. This watch which I have lost costs a lot of money.

10. We were given a lot of information most of the which was useless.

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.Rewrite these sentences without changing the meaning,using the conditional type 1:

1.Work harder and you will pass the entrance exam.

If........you Work harder ,you will pass the entrance exam.........................................................................

2.Hurry up or we will miss the last bus,

If.........you don't Hurry up ,we will miss the last bus.......................................................................

3.Be more serious in training;otherwise,you can't play in the next match.

If........you are more serious in training,you can't play in the next match.........................................................................

4.We must act now or there won't be any forests left on earth.

If...........we don't act now,there won't be any forests left on earth......................................................................

5.Unless his parents help him a lot,he can't set up this company.

If......his parents don't help him a lot,he can't set up this company...........................................................................

6.She won't get any achievement unless she gets some inspiration from her successful mother.

If.........she doesn't get some inspiration from her successful mother,She won't get any achievement ..........................................................................................................................................

7.He practises speaking English everyday,so I think his English is sure to be improved

If..........he practises speaking English everyday,his E will be improved...............................................................................................................................