The document discusses the passive voice, including its main uses, formation, and how to transform sentences from active to passive voice. The main uses of the passive voice are when the receiver of the action is more important than the doer, the doer is unknown or unimportant, or the doer is too obvious to mention. To form the passive voice, the verb "to be" is used along with the past participle of the main verb. When transforming a sentence from active to passive voice, the object of the active sentence becomes the subject of the passive sentence.

1. The passive voice
Guillermo Pérez Ferrand

2. Use of the passive voice
Main uses:
• The receiver of the action is more important than the doer or performer
• The doer or performer of the action is unknown or unimportant
• The doer or performer of an action is too obvious to be worth mentioning
Other uses:
• To conceal the performer of an action or the identity of a person responsible
for a mistake
• To emphasize the doer or performer of an action

3. Form of the passive voice
General rule:
• To be + Past Participle
Examples:
• Present simple: eat/s ----------------- is/are eaten
• Past simple: sold ------------------- was/were sold
• Present perfect: has/have asked ----- has/have been asked
• Future with will: will buy --------------- will be bought
• Going to future: going to play --------- going to be played
• Modal verbs: can do --------------- can be done

4. Active to passive transformation.
Changes in the sentence
Active voice
The object receives the action of the verb
Subject + main verb + Object
Passive voice
The subject receives the action of the verb and the object of the active verb
becomes the subject of the passive verb
Object + To be + main verb + Subject
of the active
sentence
same form
than the
main verb
past
participle
of the active
sentence

5. Examples
My friend speaks japanese -------- Japanese is spoken by my friend
You didn´t wash the car -------- The car wasn´t washed by you
I have written an email -------- An email has been written by me
We will play a football match -------- A football match will be played
I must study the exam hardly -------- The exam must be studied hardly by me