1. People balive that 13 is an unlucky number.

→ 13 is believed to be an unlucky number

2.They know that English is an international language.

→ English is known to be an international language.

3. I have heard her sing this song several times.

→ This song has been heard to sing several times by her

4. People saw him steal your car.

→ He was seen to steal your car

5. They say that John is the brightest student in class.

→ It's said that John is the brightest student in class.

6. Open your book.

→ Your book is opened

7. She asvised me to sell that house.

→ I was asvised to sell that house by her

9. They think that he has died a natural death....

→ It's thought that he has died a natural death.

10. He won't let you do that silly thing again.

→ You won't be let to do that silly thing again

11. He orders us to clean the floor.

→ We are ordered to clean the floor by him

12. You must see it to belive it.

→ It must be seen to belive it

13. People belive that the earth stood still.

→ It's belived that the earth stood still.

14.People son't make the children work hard.

→ The children aren't made to work hard

15. Don't do that silly thing again.

→ That silly thing isn't done again

16. They begged us to help him.

→ We are begged to help him by them

~Học tốt:33~

→ 13 is believed to be an unlucky number

→ English is known to be an international language.

→ This song has been heard to sing several times by her

→ He was seen to steal your car

→ It's said that John is the brightest student in class.

→ Your book is opened

→ I was asvised to sell that house by her

→ It's thought that he has died a natural death.

→ You won't be let to do that silly thing again

→ We are ordered to clean the floor by him

→ It must be seen to belive it

→ It's belived that the earth stood still.

→ The children aren't made to work hard

→ That silly thing isn't done again

→We are begged to help him by them