120.Listen to the teacher’s explanation or you can’t understand anything.

If you don't listen to the teacher’s explanation, you can’t understand anything.

121. I was sick yesterday, so I didn’t go to class.

If I hadn't been sick yesterday, I would have gone to class.

122. Because Alan never eats breakfast, he always overeats at lunch.

If Alan ate breakfast, he wouldn't always overeat at lunch.

123. Peter didn’t finish unloading the truck because John didn’t help him.

If John had helped Peter, he would have finished unloading the truck.

124. He didn’t hurry, so he missed the train.

If he had hurried, he wouldn't have missed the train.

125. My brother didn’t leave the car keys, so I couldn’t pick him up at the station.

If my brother had left the car keys, I couldn’t have picked him up at the station.

126. We didn’t go because it rained.

 If it hadn’t rained, we could have gone.

127. We didn’t go on holiday because we didn’t have enough money.

If we had had enough money, we would have gone on holiday.

1. He lost his money simply because he wasn't careful. (If)

=> If he hadn't been careless , he woundn't have lost his money

2. He didn't hurry, so he missed the train. (If)

=> If he had hurried, he could have caught the train.

3. We didn't go because it rained. (If it hadn't)

=> If it hadn't rained we would have gone

4. Without this treatment, the patient would have died. (If he)

=> If it hadn’t been for this treatment, the patient would have died.

5. Mr.Mills lost his job because he was late every day. ( If Mr.Mills)

=> If Mr Mills hadn't been late everyday ,he wouldn't have lost his job

6. We didn't go on holiday because we didn't have enough money. (If we)

=> . If we had had enough money we would have gone on holiday.

1. He lost his money simply because he wasn't careful. (If)

=>if he had been cafeful, he would not have lost his money

2. He didn't hurry, so he missed the train. (If)

=>If he had hurried, he would have missed.

3. We didn't go because it raines. (If it hadn't)

=>If it hadn't rained, we would have gone.

4. Without this treatment, the patient would have died. (If he)

=>If he hadn't been for this treatment, the patient would have died

5. Mr.Mills lost his job because he was late every day. ( If Mr.Mills)

=>If Mr.Mills losts his job ,he lates every day

6. We didn't go on holiday because we didn't have enough money. (If we)

=> If we had had enough money, we would have gone holiday

7. I was sick yesterday, so I didn't go to class (If)

=>If I am sick, I don't go to school

8. Because Alan never eats breakfast, he always overeats at lunch (If)

=>If Alan never eats breakfast, he always overeats at lunch

9.Fred wouldn't do that if he didn't have your permission (Unless)

=>Unless Fred had your permission, he wouldn't for that

10. If no more guests come, there will be enough food for everyone. (Unless)

=>Unless no more guests come, there will not be enough food for everyone

Rewrite the sentence the using conditional sentence (type 2,3)
1. Carol didn’t answer the phone because she was studying.

=> If Carol hadn't been studying, she would have answered the phone.
2. He lost his job because he was late every day.

=> If he hadn't been late every day, he wouldn't have lost his job.
3. He’s fat because he doesn’t take any exercise.

=> If he took some exercise, he wouldn't be fat.
4. I don’t travel anywhere because I don’t have enough time.

=> If I had enough time, I would travel somewhere.
5. I feel better now because you talked to me about my problems last night.

=> If you hadn't talked to me about my problems last night, I wouldn't feel better now.
6. I feel sick because I ate too much ice-cream.

=> If I hadn't eaten too much ice-cream, I wouldn't feel sick.
7. I feel very tired now because I stayed up late last night.

=> If I hadn't stayed up late last night, I wouldn't feel very tired now.
8. Margaret wasn’t injured in the crash because she was wearing a seat belt.

=> If Margaret hadn't been wearing a seat belt, she would have been injured in the crash.
9. Peter is fat because he eats so many chips.

=> If Peter didn't eat so many chips, he wouldn't be fat.
10. Robert got a bad cough because he started smoking cigarettes.

=> If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough.

cảm ơn ạ

II/ Rewrite the following sentences, using “The first conditional sentence”.

1. Your mum will be very surprised when you cook her breakfast.

- If ___________________you cook your mum her breakfast, she will be very surprised__________________________________________.

2. Follow these safety instructions or you may get burn.

- If you _______________don't follow these safety instructions, you may get burn__________________________________________.

3. Children may only eat junk food unless we talk to them about healthy eating.

- If we don’t ________________________take to children about healthy eating, they may only eat junk food ______________________________.

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

Exercise 1:

1. I won't go to school unless I feel better.
2. Tony won't walk to you unless you question him. 
3. You'll be cold unless you put your overcoat on.
4. You will fail the exam unless you work hard.
5. You'll get a cold unless you keep your feet dry.
6. I won't go to the party unless you go.
7. I'll miss my flight unless I leave now.
8. I can't send you a postcard unless you give me your address.
9. I can't build a school for the poor unless I win a big lottery.
10. I will call the police unless you leave me alone.

8. If John didn't live in an area affected by air pollution, he wouldn't have breathing problem.

9. If I didn't busy, I could go to the supermarket.

10. death

11. industrial

12. untreated

13. contamination

14. harmful

15. Natural

I ,rewrite these sentences, using conditional sentences

1, whitout the sun, we wouldn't exist

=> If it hadn't been for the sun, we wouldn't have existed.

2, peter was very nervous and failed te driving test

=> If Peter hadn't been nervous, he wouldn't have failed the driving test.

3,i can't tell you what time it is because i don't have a watch

=> If I had a watch, I would tell you wha time it is.

12, the dress is very expensive , so she can't buy it

=> If the dress weren't expensive, she could have bought it.

13, the teacher was very angry. his pupils ***** their home work carelessly

=> If the teacher hadn't been angry, his pupils wouldn't have done their homework carelessly.

II , rewrite these senten as ddirected

1, he doesn't eat fish when he isn't extremely hungry

=> if he weren't extremely hungry, he wouldn't have eaten fish.

2 , we didn't hurry , so we were late for the concert

=> if we had hurried, we wouldn't have been late for the concert.

I ,rewrite these sentences, using conditional sentences

1, whitout the sun, we wouldn't exist

=> If it hadn't been for the sun, we wouldn't have existed.

2, peter was very nervous and failed te driving test

=> If Peter hadn't been nervous, he wouldn't have failed the driving test.

3,i can't tell you what time it is because i don't have a watch

=> If I had a watch, I would tell you wha time it is.

12, the dress is very expensive , so she can't buy it

=> If the dress weren't expensive, she could have bought it.

13, the teacher was very angry. his pupils ***** their home work carelessly

=> If the teacher hadn't been angry, his pupils wouldn't have done their homework carelessly.

II , rewrite these senten as ddirected

1, he doesn't eat fish when he isn't extremely hungry

=> if he weren't extremely hungry, he wouldn't have eaten fish.

2 , we didn't hurry , so we were late for the concert

=> if we had hurried, we wouldn't have been late for the concert.