This factory produces machine tools.→→→→Machine tools are produced in this factory.
The found a wallet in the car.→→→→A wallet was found in the car.
They are repairing the bridge.→→→→The bridge is being repaired.
They have repaired the bridge.→→→→The bridge has been repaired.
They often make fun of her.→→→→She is often made fun of.
He took great care of his books.→→→→His books were taken great care of.