Dưới đây là các câu đã được chuyển đổi nhưng vẫn giữ nguyên nghĩa:

1. The office is cleaned by the cleaner every day.
2. Emails are not sent by them.
3. Is the grass cut by her?
4. Chocolate is preferred by my friend.
5. Cars are often stolen by him.
6. Loud music is played by my brothers.
7. English is spoken by my mother.
8. The London parks are loved by my uncle.
9. Staff is wanted by the company.
10. Articles are written by journalists.
11. Julie is loved by Peter.
12. A lot of books are not read by my sister.
13. Dinner is not cooked by my mother every day.
14. Milk is delivered by the milkman in the mornings.
15. Flowers are not bought by them for the flat.
16. The car is not washed by my neighbours every week.
17. A report is written by the policeman every Friday.
18. The roads are not fixed by them in our country.
19. New houses are not built by our friends every year.
20. Vegetables are sold by the farmer in the market.