They will keep the door open.
The door will be kept open.
Jerry has answered all the questions
All the questions have been answered by Jerry
They speak Italian in Italy.
Italian is spoken in Italy
Lucy helped dad yesterday.
Dad was helped by Lucy yesterday
The cat watches the bird.
The bird is watched by a cat
I visit my grandparents every weekend
My grandparents are visited by me every weekend.
They have decorated the house
The house has been decorated by them
We finished the work in time.
The work was finished in time.