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Passive Voice:

Be + past participle

|Active |Passive |
|Simple Present: Maryhelps the boy. |The boy is helped by Mary. |
|Present Continuous: Mary is helping the boy. |The boy is being helped byMary. |
|Present Perfect: Mary has helped the boy. |The boy has been helped by Mary. |
|Simple Past: Mary helped theboy. |The boy was helped by Mary. |
|Past Continuous: Mary was helping the boy. |The boy was being helped by Mary.|
|Past Perfect: Mary had helped the boy. |The boy had been helped by Mary. |
|Simple Future: Mary will help the boy.|The boy will be helped by Mary. |
|Be going to: Mary is going to help the boy. |The boy is going to be helped by Mary.|
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Questions:

Auxiliary verb + subject + pastparticiple (of the verb)

Did Mary help the boy?—active
Was the boy helped by Mary?—passive

Is Mary helping the boy?—active
Is the boy being helped by Mary?—passive

Has Mary helped theboy?—active
Has the boy been helped by Mary?—passive

Indirect and Direct object: cualquiera de los dos puede ser transformado a la voz pasiva, usando la misma estructura del cuadro anterior.

Ex.Someone gave Brian (I.O.) an award. (D.O.)
Brian was given an award.

Someone gave an award (D.O.) to Brian. (I.O.)
An award was given to Brian.

* Todas las oraciones anteriores tienen el...