Active And Passive Voice

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

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

	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

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:

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.

We can use phrasal verbs in the passive:

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.

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

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

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. 

The active and passive forms of the verb write are given below:

When the active verb is in the simple present tense

Active verb: write/writes

Passive verb: is/am/are written

• He writes a letter. (Active)
• A letter is written by him. (Passive)

When the active verb is in the present continuous tense

Active verb: is/am/are writing

Passive verb: is/am/are being written

• He is writing a letter. (Active)
• A letter is being written by him. (Passive)

When the active verb is in the present perfect tense

Active verb: has/have written

Passive verb: has/have been written

• He has written a letter. (Active)
• A letter has been written by him. (Passive)

When the active verb is in the simple past tense

Active verb: wrote

Passive verb: was/were written

• He wrote a letter. (Active)
• A letter was written by him. (Passive)

When the active verb is in the past continuous tense

Active: was/were writing

Passive: was/were being written

• He was writing a letter. (Active)
• A letter was being written by him. (Passive)

When the active verb is in the past perfect tense

Active verb: had written

Passive verb: had been written

• He had written a letter. (Active)
• A letter had been written by him. (Passive)

When the active verb is in the simple future tense

Active verb: will/shall write

Passive verb: will/shall be written

• He will write a letter. (Active)
• A letter will be written by him. (Passive)

When the active verb is in the future perfect tense

Active verb: will/shall have written

Passive verb: will/shall have been written

• He will have written a letter. (Active)
• A letter will have been written by him.(Passive)

 Reference: British Council