The document discusses the differences between active and passive voice. To form a passive phrase, the verb "to be" is used along with the past participle of the main verb. Negative and interrogative passive phrases are formed by adding "not" or starting with "to be", respectively. Various tenses in both active and passive voice are also shown, such as the past simple, present perfect, and modals. Finally, examples demonstrate how changing from active to passive voice involves making the subject the object and vice versa.

1. PASIVE AND ACTIVE
To form a pasive phrase we have to use the verb to be + the
past participle or we add -ed at the end of the verb if the
verb is regular.
To form a negative pasive phrase we have to add not to the
auxiliar verb.
That film wasn't directed by Spielberg.
To form a interrogative pasive phrase we have to start the
phrase with the to be.
¿Were you examined by the doctor?

2. Tense Active Pasive
Present simple This singer writes many
songs
Many songs are written
by this singer.
Past simple This singer wrote many
songs.
Many songs were
written by this singer.
Future simple This singer will write
many songs.
Many songs will be
written by this singer.
Present continuos This singer is writing
many songs.
Many songs are being
written by this singer.
Past continuos This singer was writing
many songs.
Many songs were being
written by this singer.
Present perfect simple This singer has written
many songs.
Many songs had been
written by this singer.
Past perfect simple This singer had written
many songs.
Many songs had been
written by this singer.
Have to This singer has to write
many songs.
Many songs have to be
written by this singer.
Be going to This singer is going to
write many songs.
Many songs are going to
be written by this singer.
Modals The singer should write
many songs.
Many songs should be
written by this singer.
Tense Active Pasive
Present simple This singer writes many
songs
Many songs are written
by this singer.
Past simple This singer wrote many
songs.
Many songs were
written by this singer.
Future simple This singer will write
many songs.
Many songs will be
written by this singer.
Present continuos This singer is writing
many songs.
Many songs are being
written by this singer.
Past continuos This singer was writing
many songs.
Many songs were being
written by this singer.
Present perfect simple This singer has written
many songs.
Many songs had been
written by this singer.
Past perfect simple This singer had written
many songs.
Many songs had been
written by this singer.
Have to This singer has to write
many songs.
Many songs have to be
written by this singer.
Be going to This singer is going to
write many songs.
Many songs are going to
be written by this singer.
Modals The singer should write
many songs.
Many songs should be
written by this singer.

3. Pasive VS Active
Active Pasive
They ate all the food very quickly. All the food was eaten very quickly.
We have sold the car. The car has been sold.
It is nice when people invite me to
dinner.
It is nice when I am invited to dinner.
On a clear day you can see África from
Tarifa.
On a clear day África can be seen from
Tarifa.
They sold their house their house last
week.
Their house was sold last week.
Active Pasive
They ate all the food very quickly. All the food was eaten very quickly.
We have sold the car. The car has been sold.
It is nice when people invite me to
dinner.
It is nice when I am invited to dinner.
On a clear day you can see África from
Tarifa.
On a clear day África can be seen from
Tarifa.
They sold their house their house last
week.
Their house was sold last week.

4. ACTIVE VOICE---------------------------------------PASIVE VOICE
Marilyn mailed the letter--The letter was mailed by Marilyn
Verb Verb + be auxiliary
To form a pasive phrase you have to put the verb to be in
the same time that was in the active form.
If we have me, we have to changed it to I.
They showed me their last album.
I was shown their last album.