They should arrest him.
He should be arrested.
Nobody can do it.
It can't be done.
They have found a cure for the disease.
A cure has been found for the disease.
You have to switch it off.
It has to be switched off.
They will have found him by now.
He will have been found by now.
They are making a lot of noise.
A lot of noise is being made.
They close the cafe at 5pm.
The cafe is closed at 5pm.
Simon will interview the actor.
The actor will be interviewed by Simon.
Someone might have stolen the bag.
The bag might have been stolen.
Someone ought to feed this dog.
This dog ought to be fed.
Somebody had broken the TV.
The TV had been broken.
A million people watched the show.
The show was watched by a million people.
Spectators mustn't throw anything onto the stage.
Nothing must be thrown onto the stage.
A person is reviewing the film.
The film is being reviewed.
People will remember her forever.
She'll be remembered forever.
Someone needs to fix the laptop.
The laptop needs to be fixed.