1   A 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 Simpleam/is/are + (pp)

• Books are sold here.
• Aqui vendem-se livros.
 
 
Present Continuousam/is/are being + (pp)

• The car is being repaired.
• O carro está a ser reparado.
 
 
Present Perfect Simplehas/have been + (pp)

• The car has been stolen.
• O carro foi roubado.
 
 
Past Simplewas/were + (pp)

• She was arrested yesterday.
• Ela foi presa ontem.
 
 
Past Continuouswas/were being + (pp)

• The car was being repaired.
• O carro estava a ser reparado.
 
 
Past Perfect Simplehad been + (pp)

• The car had been stolen.
• O carro tinha sido roubado.
 
 
Future Simplewill be + (pp)

• The parcel will be delivered.
• O embrulho será entregue.
 
 
Future Perfect Simplewill have been + (pp)

• All the documents will have been
  signed
by Friday.
• Todos os documentos serão
  assinados até sexta-feira.
 
 
Future going toam/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.
 
 
Infinitiveto 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 Continuoushas/have been being + (pp)
Past Perfect Continuoushad been being + (pp)
Future Continuouswill be being + (pp)
Future Perfect Continuouswill have been being + (pp)