Vos Pasiva

It is said that a sentence is in the passive voice when the meaning of the verb is received by the grammatical person who relates that:
Buenos Aires was founded by Pedro de Mendoza.

  Is formedwith the auxiliary verb to be and the past participle of the verb to be conjugated.

  The complement of the active sentence becomes the passive subject. As in Castilian, the subject of the activeagent may retain as subject.

  When a verb has two supplements can make two passive structures:
a) A book was sent to Tom by Mr. Smith, a book was sent to Tom by Mr. Smith.
b) Tom was sent a bookby Mr. Smith (passive language). This structure is not possible in Castilian.
The passive voice is formed with the verb to be conjugated plus the participle of the main verb. English is much morefrequent than in Spanish and usually appears when it is not important who performs an action but the fact itself. So whenever we see not a passive, we have to translate it literally, as in Spanish soundsmore forced. You can only use the passive with transitive verbs (verbs that take a direct object).

A letter is written by Tom
A letter is being written by Tom
A letter was being written by Tom
Aletter was written by Tom
A letter has been written by Tom
A letter had been written by Tom
A letter will be written by Tom
A letter is going to be written by Tom
A letter can be written by TomA letter could be written by Tom
A letter must be written by Tom
A letter may be written...
A letter might be written...

Construction of the Passive Voice

The structure of the passive voiceis very simple:

subject + auxiliary verb (be) + main verb (past participle)

The main verb is always in its past participle form.

Use of the Passive Voice

We use the passive when:

wewant to make the active object more important
we do not know the active subject
Conjugation for the Passive Voice

We can form the passive in any tense. In fact, conjugation of verbs in the...