http://www.ego4u.com/en/business-english/grammar/passive

Form of Passive

Subject + finite form of to be + Past Participle (3rd column of irregular verbs)

Example: A letter was written.

When rewriting active sentences in passive voice, note the following:

  • the object of the active sentence becomes the subject of the passive sentence
  • the finite form of the verb is changed (to be + past participle)
  • the subject of the active sentence becomes the object of the passive sentence (or is dropped)

http://www.ego4u.com/en/cram-up/grammar/passive

Passive voice is used when the focus is on the action.

Simple Present Mr Smith writes the delivery notes. The delivery notes are written (by Mr Smith).
Present Progressive Mr Smith is writing the delivery notes. The delivery notes are being written (by Mr Smith).
Simple Past Mr Smith wrote the delivery notes. The delivery notes were written (by Mr Smith).
Present Perfect Mr Smith has written the delivery notes. The delivery notes have been written (by Mr Smith).
Past Perfect Mr Smith had written the delivery notes. The delivery notes had been written (by Mr Smith).
Future Mr Smith will write the delivery notes. The delivery notes will be written (by Mr Smith).
Ausiliary Verbs Mr Smith must write the delivery notes. The delivery notes must be written (by Mr Smith).

Check it out!…

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-past

Exercise on Passive

1.Rewrite the sentences in passive voice.

  1. I confirm the reservation.
  2. We will deliver the goods immediately.
  3. We arranged a meeting.
  4. You can cancel the contract within five business days.
  5. They execute all orders carefully.
  6. You have made a mistake.
  7. We are processing your order.
  8. Jane had booked a flight.
  9. He has not answered our letter.
  10. She did not sign the contract.

.

2.Rewrite the sentences in passive voice.

  1. She sang a song. –
  2. Somebody hit me. –
  3. We stopped the bus. –
  4. A thief stole my car. –
  5. They didn’t let him go. –
  6. She didn’t win the prize. –
  7. They didn’t make their beds. –
  8. I did not tell them. –
  9. Did you tell them? –
  10. Did he send the letter? –