.     The weatherman says it is going to rain this weekend. Therefore we won’t have a picnic.

     __If the weatherman says it is going to rain this weekend, we won’t have a picnic._________________________ .

        Betty will not go to the party tonight because Tom will not go.

     ____If Tom goes to the party, Betty will go tonight_______________________ .

   .     Leave a bowl of water under the sun and wait for it to evaporate.

     ______If you leave eave a bowl of water under the sun, it evaporates._____________________ .

   .     Press this button and the TV will shut off.

     _If you press this button, the TV will shut off__________________________ .

   .   A fuel crisis is what we are going to face as soon as we use up all the fuel.

     ____If we use up all the fuel, we will face a fuel crisis_______________________ .

Unless it rains tonight, we won't go out

rains tonight, we won't go out

Unless it rains tonight ,we will go out

   1.     Don’t go out in the rain because you will get wet.

     __If you go out in the rain, you will get wet._________________________ .

   2.     I won’t enjoy the film if you aren’t with me.

     _I won’t enjoy the film unless you are with me.__________________________ .

   3.     My brother will have enough money. He will buy a bicycle.

     __If my brother has enough money, he will buy a bicycle._________________________ .

   4.     I will buy a new hat. I will give it to you.

     __ If I buy a new hat, I will give it to you._________________________ .

   5.     Let’s ask the teacher. He will explain it to you.

     __If you ask the teacher,he will explain it to you._________________________ .

1.If you go out in the rain,you will get wet.

2.If you aren't with me,I will not enjoy the film.

3.If my brother has enough money,he will buy a bicycle.

4.If I buy a new hat,I will give it to you.

5.If you ask the teacher,he will explain it to you.

1 If you go out in the rain, you will get wet

2 If you are with me, I will enjoy the film

3 If my brother has enough money, he will buy a bicycle

1. If you go out in the rain, you will get wet.

2. If you aren't with me, I won't enjoy the film.

3. If my brother has enough money, he will buy a bycicle

If Lan asks her teacher, he will explain it to her

If we had some money, we would have holiday

If we have holiday, we will go to Thailand

If you don't drive carefully, you will have an accident

If Lan's parents lived near HN, she would see them on weekend

If I knew the answer, I would tell you

1.Lan will ask her teacher.He will explain it to her

=>If Lan asks her teacher, he will explain it to her

2.We don't have holiday because we haven't got any money

=>If we got money, we would have holiday

3.we will have holiday.we will go to Thailand

=>if we have holiday, we will go to Thailand

4.drive carefully or you'll have an accident

=>if you don't drive carefully, you'll have an accident

5.Lan's parente don't live near.Hanoi,so she doesn't see them on weekend

=>if Lan's parents lived near Hanoi, she would see them on weekend

6.i don't know the answer so i ean't tell you

=>if I knew the answer, I would tell you

1.Unless it rains next Sunday, we will go on a picnic.
2 The weather was so bad that we couldn't go camping. 
3 Chinese and Japanese are as difficult as a few languages 
4 We haven’t intent a vacation so far this year 

1. If it doesn't rain next Sunday, we will go on a picnic.
Unless ………………it rains next Sunday, we will go on a picnic. ……………………………………………………………………………………………………
2. It was such bad weather that we couldn't go camping.
The weather …………………was so bad that we couldn't go camping. ……………………………………………………………………………………………
3. Few languages are as difficult as Chinese and Japanese.
Chinese and Japanese are …………………the most difficult languages……………………………………………………………………………
4. We haven’t had any intention of having a vacation so far this year.
We haven’t ……………intended to have a vacation so far this year.…………………

Mẫu câu conditional 1:

If + S + V, S + will + V

1. Turn off all the lights and you will not pay more money.
If you turn of all the lights, you won't pay more money.
2. Unless she wears warm clothes, she will have a cold.
If she doesn't wear warm clothes, she will have a cold.

CHÚ THÍCH: unless=if not
3. Be careful or you may have an accident.
If you don't be careful you may have a accident.
4. phone your parents or you have a trouble.
If don't phone your parents, you'll have a trouble.
5. Unless she whispers, everyone knows what she is saying.
If she doesn't whisper, everyone will know what she is saying.

6. Stay here and you will feel save.
If you stay here, you'll feel save.
7. Pay electricity bill today or your electricity will be cut off.
If .you don't pay electricity today, your electricity will be cut off.
8. Stop smoking otherwise your cough may be worse.
If you don't stop smoking, your cough will be worse.
9. Unless we use less fossil fuel, they will be run out soon.
If we don't use less fossil fuel, they will be run out soon.
10. Unless it stops raining today, we may be faced with a serious flood.
If it doesn't stop raining today, we will may face with a serious flood.

Rewrite the sentences, using Conditional sentences 

1. Read that book, and you will understand that problem

-> If you read that book, you will understand that problem

-> Unless you read that book, you won't understand that problem

2. Go to the seaside with me, and you will have a lot of fun

-> If you go to the seaside with me, you will have a lot of fun

3. Take morning exercises regularly, and you will feel healthy

-> If you take morning exercises regularly, you will feel healthy

4. Nam will get better, but he has to take his medicine

-> If Nam takes his medicine, he will get better

5. Hoa will catch the bus, but she has to leave now

-> If Hoa leaves now, she will catch the bus

6. Ba won't be late but he has to hurry

-> If Ba hurries, he won't be late

7. Do more grammar exercises or you'll get poor marks

-> If you don't do more grammar exercises, you will get poor marks

-> Unless you do more grammar exercises, you will get poor marks

8. Hurry up or you will be late for school

-> If  you hurry up, you won't be late for school

-> Unless you hurry up, you will be late for school

9. Be careful or you will fall over the rock

-> If you are careful, you won't fall over the rock

-> Unless you are careful, you will fall over the rock

1. Read that book, and you will understand that problem

-> If you don't read that book, you won't understand that problem 

-> Unless you read that book, you won't undertand that problem

2. Go to the seaside with me, and you will have a lot of fun

-> If you don't go to the seaside with me, you won't have a lot of fun

3. Take morning exercises regularly, and you will feel healthy

-> If you don't take morning exercise regularly, you won't feel healthy

4. Nam will get better, but he has to take his medicine

-> If Nam doesn't have to take his medicine, he won't get better

5. Hoa will catch the bus, but she has to leave now

-> If Hoa doesn't leave now, she won't catch the bus

6. Ba won't be late but he has to hurry

-> If Ba doesn't hurry, he will be late

7. Do more grammar exercises or you'll get poor marks

-> If you don't do more grammar exercises, you will get poor marks

-> Unless you don't more grammar excercises, you will get poor marks

8. Hurry up or you will be late for school

-> If you don't hurry up, you will be late for school

-> Unless you hurry up, you won't be late for school

9. Be careful or you will fall over the rock

-> If you are not careful, you will fall over the rock

-> Unless you careful, you won't fall over the rock

1. Read that book, and you will understand that problem

-> If you read that book, you will understand that problem

-> Unless you read that book, you won't understand that problem

2. Go to the seaside with me, and you will have a lot of fun

-> If you go to the seaside with me, you will have a lot of fun

3. Take morning exercises regularly, and you will feel healthy

-> If you take morning exercises regularly, you will feel healthy

4. Nam will get better, but he has to take his medicine

-> If Nam takes his medicine, he will get better

5. Hoa will catch the bus, but she has to leave now

-> If Hoa leaves now, she will catch the bus

6. Ba won't be late but he has to hurry

-> If Ba hurries, he won't be late

7. Do more grammar exercises or you'll get poor marks

-> If you don't do more grammar exercises, you will get poor marks

-> Unless you do more grammar exercises, you will get poor marks

8. Hurry up or you will be late for school

-> If  you hurry up, you won't be late for school

-> Unless you hurry up, you will be late for school

9. Be careful or you will fall over the rock

-> If you are careful, you won't fall over the rock

-> Unless you are careful, you will fall over the rock