Active and passive

Transitive verbs have both active and passive forms:

active		passive
The hunter killed the lion.	>>	The lion was killed by the hunter.
Someone has cleaned the windows	>>	The windows have been cleaned

	be	past participle
English	is	spoken	all over the world
The windows	have been	cleaned
Lunch	was being	served
The work	will be	finished	soon
They	might have been	invited	to the party

active		passive
I gave him a book for his birthday	>>	He was given a book for his birthday.
Someone sent her a cheque for a thousand euros	>>	She was sent a cheque for a thousand euros.

active		passive
They called off the meeting.	>>	The meeting was called off.
His grandmother looked after him.	>>	He was looked after by his grandmother.
They will send him away to school.	>>	He will be sent away to school.

be supposed to	be expected to	be asked to
be scheduled to	be allowed to	be told to

The passive forms are made up of the verb be with a past participle:

We sometimes use the verb get to form the passive:

Be careful with the glass. It might get broken.
Peter got hurt in a crash.

If we want to show the person or thing doing the action we use by:

She was attacked by a dangerous dog.
The money was stolen by her husband.

We can use the indirect object as the subject of a passive verb:

We can use phrasal verbs in the passive:

Some verbs very frequently used in the passive are followed by the to-infinitive:

John has been asked to make a speech at the meeting.
You are supposed to wear a uniform.
The meeting is scheduled to start at seven. 

Online exercise Active and passive

http://www.autoenglish.org/gr.pas.i.htm.

http://www.englishclub.com/grammar/verbs-voice_quiz.htm