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 invented to John’s birthday party last month.

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

→ The dinner is being prepared (by her mother) in the kitchen.

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 teacher).

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

→ The accident was caused in this city (by some drunk drivers).

7. Tom will visit his parents next month.

→ Tom’s parents will be visited (by him) next month.

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

→ The secretary wasn’t phoned (by the manager) this morning.

1. This flower is watered by my father every morning.
2. Fiona was invited to John’s birthday party by him last night.