1.My father waters this flower every morning.

=> this flower is watered by my father every morning

2.John invited Fiona to his birthday party last night.

=> Fiona was invited to John's birthday party last night

3.Her mother is preparing the dinner in the kitchen.

=> The dinner is being prepared in the kitchen by her mother

4.We should clean our teeth twice a day.

=>Our teeth should be cleaned twice a day

5.Our teachers have explained the English grammar.

The english grammar has been explained by our teachers

Chuyển sang câu bị động 

1 my brother waters the flowers every morning
2. John in vited Flato his birthday party last night 
3.Her sister is preparing the dinner in the kitchen 
4. We should clean ourteeth twice a day
5.Our  teacher have explained the english grammar 
6.Tom vill visit her grandparent next week
7. The greens are going to pain his house next year 
8.How many launguages do the speak in english 
9.How did the police find the last man
10.He has broken his nose in football match
=>
1. The flowers are watered every morning by my brother.
2. Flato was invited to his birthday party last night by John.
3. The dinner is being prepared in the kitchen by her sister.
4. Our teeth should be cleaned twice a day.
5. The English grammar has been explained by our teacher.
6. Her grandparents will be visited by Tom next week.
7. His house is going to be painted next year by the greens.
8. How many languages are spoken in English?
9. How was the last man found by the police?
10. His nose has been broken in the football match.

1.My father waters this flower every morning.

=> this flower is watered by my father every morning

2.John invited Fiona to his birthday party last night.

=> Fiona was invited to John's birthday party last night

3.Her mother is preparing the dinner in the kitchen.

=> The dinner is being prepared in the kitchen by her mother

4.We should clean our teeth twice a day.

=>Our teeth should be cleaned twice a day

5.Our teachers have explained the English grammar.

The english grammar has been explained by our teachers

6.Some drunk drivers caused the accident in this city.

=> The accident was caused by some drunk drivers in this city

7.Tom will visit his parents next month.

=> Tom's parents will be visited next month

8.The manager didn’t phone the secretary this morning.

=> the secretary wasn't phoned by the manager this morning

9.Did Mary make this beautiful dress?

Was this beautiful dress made by Mary?

10.I won’t hang these old pictures in the living room.

=> These old pictures won't be hung in the living room

11.The German didn’t build this factory during the Second World War.

=> This factory wasn't built by the german during the second world war

12.The Greens are going to paint this house and these cars for Christmas Day.

=>This house and these cars are going to be painted by the greeens for christmas day

13.Ann had fed the cats before she went to the cinema.

=> the cats had been fed by Ann before she went to the cinema

14.The students have discussed the pollution problems since last week.