EX 14:
1. If they weren't poor, they could help us
2. If Minh did his homework, he wouldn't be punished
3. If Quan had enough time, he could help me
4. If she doesn't take any exercise, she will be overweight
5. He wouldn't go to class late, he would have a bicycle
6. I could do homeowrk if I weren't bad at english
7. If Hai pracrised speaking frenhc, he would speak it fluently
8. If it didn't snow heavily, the meeting couldn't be cancelled
9. If todayweren't independance day, we would have to go to school
10. If John didn't eat many chips, he wouldn't be fat

Ex 8:
1. To speak english is much more difficult than to speak french
2. Now I don't go clinbing anymore
3. No mountain in the world is higher than Moun everest
4. She is the most pretty girl that I have ever met.
5. That computer doesn't work as well as this computer.
6. The white dress isn't as expensive as black dress
7. Mr. John is hte best teacher in this school
8. Is this the cheapest hat ?
9. Mr grandmother is the oldest in my family
10. Jack doesn't drive as carefully as Mark does

EX 12:
1. Mary said people were cutting down the rainforests.
2. Tom said car pollution was a big problem in his city
3. Scientists said that chemicals were destroying the ozone layer.
4. He told me to shut the door but didn't lock it.
5. Our teacher explained buring gas, oil, and coal could cause acid rain
6. Nam said he was told to be at school before 7 oclock
7. Thu said all the students would have a meeting the next week
8. Phong said his parents were very pround of his good marks
9. The teachers said all the homework had been done carefully
10. Her father said to her she could go to the movie with her friend
11. Hoa said she might visit his parents in the summer
12. The teacher said they could collect odl book for the poor students
13. The boys said they have to try their best to win the match
14. Her classmat said Lan was the most intelligent girl in our class.