1) They teach three languages at this school.
Three languages is thought at this school by them.
2) We received this letter last Saturday.
This letter was received by us last Saturday.
3) Have your dogs ever attacked you?
Have you ever been attacked by dogs?
4) Bees gather honey from flowers.
Honey from flowers is gathered by bees.
5) The storm drove the ship against a rock.
The ship was drive against a rock by the storm.
6) They are selling delicious Fruit ice cream there now.
The delicious fruit ice cream is being sold there by them now.
7) The old man showed us the way out of the wood.
The way out of the wood was shown to us by the old man.
8) The doctor will prescribe me new medicines.
New medicines will be prescribe to me by the doctor.
9) Our father has just written this computer program.
This computer program has just been written by our father.
10) They didn't invite her to this party.
She wasn't invited to this party by them.