* Subject(sujeto) : Es la persona o personas que realizan la acción.
SHE plays the guitar.
* Object (objeto) : Es la persona o personas a quienes va dirijida la acción.
I like to play with Tom.
( = I like to play with HIM)
La estructura para formar oraciones es voz pasiva, cuando tiene sujeto y objeto es :
Object + auxiliary + main verb in past participe + by + subject + complement (adverbs of time)
Passive Voice :
She was arrested by them last week.
Object : Her (Al iniciar la oración se coloca su sujeto : She)
Auxiliary : arresed está en pasado y "She" es singula, entoces usamos : was
Main verb in pp : arrested (el pasado participio de arrested es el mismo)
by : by
subject : They (Al final una oración se coloca su objeto : them)
Complement : last week
2) The letter was written by John
3) Ten friends were invited by them to the party.