Voz Passiva

voz passiva (passive voice) forma-se da seguinte maneira:
BE + PAST PARTICIPLE
onde BE	=	verbo auxiliar (ser/estar)
e PAST PARTICIPLE	=	verbo principal no particípio passado (pp)
Exemplos:

Present Simple	am/is/are + (pp)
	• Books are sold here.
	• Aqui vendem-se livros.
Present Continuous	am/is/are being + (pp)
	• The car is being repaired.
	• O carro está a ser reparado.
Present Perfect Simple	has/have been + (pp)
	• The car has been stolen.
	• O carro foi roubado.
Past Simple	was/were + (pp)
	• She was arrested yesterday.
	• Ela foi presa ontem.
Past Continuous	was/were being + (pp)
	• The car was being repaired.
	• O carro estava a ser reparado.
Past Perfect Simple	had been + (pp)
	• The car had been stolen.
	• O carro tinha sido roubado.
Future Simple	will be + (pp)
	• The parcel will be delivered.
	• O embrulho será entregue.
Future Perfect Simple	will have been + (pp)
	• All the documents will have been signed by Friday.
	• Todos os documentos serão assinados até sexta-feira.
Future going to	am/is/are going to be + (pp)
	• The problem is going to be solved.
	• O problema será resolvido.
Modals (present)	can/could/may/etc. be + (pp)
	• What you are asking can be done.
	• O que estás a pedir pode ser feito.
Modals (past)	can/could/may/etc. have been + (pp)
	• He could have been killed.
	• Ele poderia ter sido morto.
Infinitive	to be + (pp)
	• The job needs to be done.
	• O trabalho precisa-se de ser feito.

2 Os tempos verbais seguintes são raramente empregues na voz passiva devido à falta de boa sonância:

Present Perfect Continuous	has/have been being + (pp)
Past Perfect Continuous	had been being + (pp)
Future Continuous	will be being + (pp)
Future Perfect Continuous	will have been being + (pp)