3 . My brother paints the gate

=> the gate is painted by My brother

4.

=>English is spoke all  over the world (by people)

5

=>The letter is wrote by Tom

6

=>Hoa wasn't invite to his birthday by Peter

7

=>This room is used very often (by we)

8

=>Us are often took to the zoo at weekends by our father

9

=> Milk is used for making butter and cheese(by people)

10

=> bottles of milk is brought to houses by the milk man

3. The gate is painted by my brother.

4. English is spoken all over the world.

5. The letter is written by Tom.

6. Hoa isn't invited by Peter to his party.

7. This room isn't used very often.

8. We are often taken to the zoo by our father at weekends.

9. Milk is used for making butter and cheese.

10. The bottles of milk are brought by the milkman to houses.

Cấu trúc câu bị động thì quá khứ đơn: S + tobe(is,am,are) + P2  + O (by sb)