They study English at school.
English is studied at school by them.
Photos are taken by the photographer.
The photographer takes photos.
The passive voice is used if you don't know who performed the action described in the sentence
Correct
George was taken to hospital because he had a heart attack. (Why...)
Why was George taken to hospital?
We were invited by our neighbours to their party.
Passive
She visited me yesterday.
Yesterday I was visited by her.
This actor was chosen as the best one by the Academy.
The Academy chose this actor as the best one.
The passive voice is used if you want to show who did the action.
Incorrect.
The car was stolen between 10 pm and midnight. (When...)
When was the car stolen?
The painting was sold to an anonymous buyer.
Passive.
My mother is cooking a tasty dinner.
A tasty dinner is being cooked by my mother.
Computer science was included in the school curricular as a compulsory subject.
They include computer science in the school curricular.
In the passive voice we put the subject at the end of the sentence.
Correct
Tickets for the concert are sold at all large music stores. (Where...)
Where are the tickets for the concert sold?
Peter is going to build a house in summer.
Active
You have made the best decision.
The best decision has been made by you.
The students have been sent home by the Principal.
The principal has sent the students home.
The passive voice is used when the receiver of the action (получатель действия) is active.
Incorrect
The open air concert has been cancelled. (Why...)
Why has the open air concert been cancelled?
Forty people have been injured.
Passive
We will buy a new house next summer.
A new house will be bought next summer (by us).
New Year promises will be made next new year's eve by people.
People will make promises next year's eve.
This old man was asked a difficilt question. Can we put this sentence into active?
No, because we don't know who did the action.
French is spoken in France. (Where...)
Where is French spoken?
The quiet cat secretly snuck up on the still and dirty rat and killed it using its paws.
Active