you work hard, you will fail the exams. 

you do not save any money, you will not be able to buy the house. 

you behave yourself, your parents will be very unhappy. 

If you do not have your hair cut, they will not let you in.

you do it carefully, you will feel sorry afterwards. 

you do not ask him first, he won't offer to help. 

you go out more, you will fail ill. 

you take a hat with you, you will be caught in the rain on the way back. 

you do not write it again more carefully, he will not be able to read it. 

you have another look at those lessons, you will get bad marks. 

1.      Work hard or your parents will be sad.

ð Unless you don't work hard, your parents will be sad.

2.     They will be late for school if they don’t hurry.

ð Unless they hurry, They will be late for school

3.     You will catch a cold if you don’t keep your feet dry.

ð Unless you  keep your feet dry, You will catch a cold

4.     I don’t have a map, so i can’t show the way.

ð If I had a map, I could show the way.

5.     If you don’t have a visa, you can’t visit Thailand

ð Unless you have a visa, you can’t visit Thailand

6.     If we don’t keep the environment clean, we won’t live a happier life.

ð Unless we keep the environment clean, we won’t live a happier life.

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

ð If youdon't Stop talking, you won’t understand the lesson

8.     If he doesn’t work hard, he’ll lose his job.

ð Unless he works hard, he’ll lose his job.

9.     Practise speaking English regulary and your skill will be improved.

ð If you Practise speaking English regulary, your skill will be improved.

10. 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

11. She is lazy so she can’t pass the exam.
If she weren't lazy, she could pass the exam.

12. We can’t get the ticket because I don’t have the right change.
=> If I had the right change, we could get the ticket

13. Study hard or you won’t pass the exam.
=> If you don;t study hard, you won’t pass the exam.

14. . Turn off all the lights and you will not pay more money.

ð If you turn off all the lights,you will not pay more money.

15. . Unless she wears warm clothes, she will have a cold.

ð If she doesn't wear warm clothes, she will have a cold.

If you ask him first, he will offer to help

If you listened to me, you didn't get into so much trouble

If you were good, your parents would be very happy

If there is a screen on the window, there won't so many bugs in the room

If he doesn't busy right now, he can help them

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

1.be good or your parents will be very unhappy

if..........YOU ARE GOOD, YOUR PARENTS WILL BE VERY HAPPY...........................................................

2. do it carefully or you'll feel sorry afterwards

if.........YOU DO IT CAREFULLY, YOU WILL FEEL SORRY AFTERWARDS..............................................................

1. if you are good, your parents will be happy

2. if you do not do it carefully, you will feel sorry afterward

nếu có or dùng if trong loại ko thực ở hiện tại

1 . If you work hard you will pass the exam.
2 . If Henry fails his examination,his parents will be sad.
3. If sue go out this weekend,she wont have time to study. 
4. If it snow tomorrow I will go skiing.
5 . If he doesn’t leave soon he will mis the bus.
6 . If you phay with matches you will hurt yourself.

1. if you shouldnt work hard you wont pass the exam

2. if Henry failed his examination, his parent will be sad

3. Unless you come , I will go .

4.  if the weather'll snow tomorrow, i will go skiing

5. if he leave soon, he'll miss the bus

6. if you play the matches, you'll hurt yourself

1.   You should work hard, or you won’t pass the exam.

      If you work hard, you will pass the exam

2.   Henry fails his examination. His parents will be sad.

      If Henry fails his examination, his parents will be sad.

3.   If you don’t come , he will go

      Unless you come,  he will go

4.   I think it’ll snow tomorrow. I will go skiing.

      If it snows tomorrow. I will go skiing.

5.   He should leave soon, or he’ll miss the bus.

      If he doesn't leave soon, he’ll miss the bus.

6.   Don’t play with matches. You will hurt yourself.

     If you play with matches,you will hurt yourself.    

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

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 I tell you a secret, will you promise not to tell it to anyone else?

I won't tell to anyone else.

2. What will happen if the planet's temperature rises by just half a degree?

The sea level will rise.

3. If you're rich in the future, will you travel around the world?

I might travel around the world.

4. Will you be unhappy if I tell you a secret?

I might be unhappy.

5. If there are trips to other planets, will you go?

I will go for a trip to other planets.

1. If I tell you a secret, will you keep it?

Yes, I will.

2. What will happen if I don’t do my homework?

You will be punished by the teacher.

3. If you're rich in the future, will you buy a car?

Yes, of course.

4. Will you be unhappy if you fail the exam?

Yes, so I will study hard to get good results in the upcoming exam.

5. If there are trips to other planets, will you go to Mars?

No, I want to go on a trip to the Moon.

1. Work hard and you will get good marks.

=> If ……you work hard, you will get good marks.….……………

2. Be careful or you will have an accident.

=> If …you aren't careful, you will have an accident.………

3. Hurry up or we will miss the last bus.

=> If ……we don't hurry up, we will miss the last bus.…..……….

4. If the weather isn’t beautiful, we will stay at home.

=> Unless …the weather is beautiful, we will stay at home.……

5. If we don’t start now, we won’t get on time.

=> Unless …we start now, we won’t get on time.…..………

6. If Lan doesn’t get up early, she will miss the train.

=> Unless ……Lan gets up early, she will miss the train.………..

7. If Ba doesn’t study harder, he will fail his next exam.

 => Unless ……Ba studied harder, he will fail his next exam.…

8. If you don’t promise to return back, I won't lend you.

=> Unless ....you promise to return back, I won't lend you.......