In the passive voice, the noun that would be the object of an active sentence appears as the subject of a sentence with passive voice, so, the action described by the verb is being done to the subject by an agent.


1. John read the book in one week. (active)

    The book was read by John in one week. (passive)

2. Mike buys a car. (active)

    A car is bought by Mike. (passive)



Thank you....very useful


Thanks a lot for your class


if the subject is "somebody" then usually there is no "by ...".  Somebody/something shut the door with a bang>>The door was shut with a bang.    Someone/the enemy destroyed the gate. >> After the gate was destroyed, the defenders surredered.
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