1. I can't cook very well.

=> I'm not good at cooking

2. We can't sit on the grass because it is too wet.

=> The grass isn't dry enough for us to sit on it.

3. The builder's going to mend my roof tomorrow.

=> I have my roof is going to be mended by the builder tomorrow. 

4. "You'd better not get up too late,"

→ My mother advised me not to get up too late

5. No explanation is necessary.

=> It is necessary for no explanation

6. Can they control the city traffic?

→ Can the city traffic be controlled?

7. We couldn't drive fast since the traffic was heavy.

=> Because of the heavy traffic, we couldn't drive fast

8. I'm really sorry I didn't invite her to the party.

=> I really wish I had invited her to the party

9. The town was nearer than we thought.

=> The town wasn't farther than we thought

10. It's a shame you didn't tell me earlier.

I wish you had told me earlier.

11. They have been living here for 6 years now.

-> They moved to live here 6 years ago

12. "You shouldn't spend your weekend in the city"

→ She advised me not to spend my weekend in the city

13. "Can you give me a ride to school?”

He asked his friend could give him a ride to school

14. They made him sign a paper admitting his guilt.

=> He was made sign a paper admitting his guilt

15. The news was bad. She burst into tears.

=> It is such the bad news that she burst into tears

16. I had her car repaired by a mechanic

=> I had a mechanic repair her car.

17. If you worry, you will find it difficult to get to sleep.

=> The more you worry, the more difficult I find get to sleep 

18. That can cost a lot of money.

→ That can be expensive hoặc That can be a lot of money

19. She doesn't usually stay up so late.

=> She is not used to staying up so late.

20. We really ought to go home now.

=> It's important for us to go home now

21. My friend and I are the same height.

→ I am as high as my friend 

22. They are building a new stadium here.

→ A new stadium are being built here

23. I'm sorry I can't swim.

=> I wish I could swim

24. The dentist will have to take out the infected tooth.

→ The infected tooth will have to be taken out by the dentist. 

chúc bạn học tốt !

1, I'm not good at cookin

2,  The grass isn't dry enough for us to sit on 

3. My roof is going is goinf to be mended tomorrow

4, My mother advised me not to get up too late

5, It is necessary for no explanation

6,  Can the city traffic be controlled?

7,  Because of the heavy traffic, we couldn't drive fast

8, I wish I invited her to the party

9, The town wasn't as far as we thought

10, I wish you had told me earlier.

11, They moved here 6 years ago

12, She advised me not to spend my weekend in the city

13, He asked his friend if she could give him a ride to school

14, He was made to sign a paper admitting his guilt

15, It is such the bad news that she burst into tears

16, I had a mechanic repaired her car

17, The more you worry, the more you find it difficult to get to sleep

18, That can be costed a lot of money

19, She is not used to staying late

20, ?

21, I am the same height as my friend

22, A new stadium is being built here

23, I wish i could swim

24, The infected tooth will have to be taken out