Somebody has locked the box and I cannot open it.
The box has been locked and cannot be opened.
They turned down my offer.
My offer was turned down.
Has someone repaired that chair yet?
Has that chair been repaired yet?
Somebody has shot your uncle.
Your uncle has been shot.
Somebody broke the railroad tracks.
The railroad tracks were broken.
Someone blew a whistle three times.
A whistle was blown three times.
They will give you the answer next week.
You will be given the answer next week.
They will take her to the hospital tomorrow.
She will be taken to the hospital tomorrow.
They treated us to ice cream.
We were treated to ice cream.
Someone broke two of my dinner plates.
Two of my dinner plates were broken.
Poverty drove him to desperation.
He was driven to desperation by poverty.
Somebody will meet the visitors at the station.
The visitors will be met at the station.
Nobody has made any mistakes.
No mistakes have been made.
Somebody took it while I was out.
It was taken while I was out.