III.
1. My father waters these flower trees every morning.
-> These flowers trees are watered every morning by my father.
2. John invited Fiona to his birthday party last night.
-> Fiona was invited to John's birthday party last night by him.
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 give us a free period this Saturday to prepare the English grammar
-> The English grammar has been explained by our teachers
6. Some drunk drivers caused the accident in this city.
-> The accident in this city was caused by some drunk drivers
7. Tom will visit his parents next month.
-> His parent will be visited by Tom next month
8. The manager didn’t phone the secretary this morning.
-> The secretary wasn' t phoned by this manager this morning
9. Did Mary buy this beautiful dress?
-> Was this beautiful dress made by Marry?
10. I won’t hang these old pictures in the living room
-> These old pictures won't be hung in the living room