The function of passive voice
(Change into passive) The pricey watch is bought by famous collector.
Passive voice
Emphasizes on the person performing the action.
Emphasizes on the object receiving the action.
(Change into passive) The pricey watch was bought by famous collector
Formula of Passive Voice
Active voice
The function of passive voice
The function of active voice
(Change into active) The famous collector bought the pricey watch
Shows that the action is more important tha the person.
(Change into active) The famous collector buys the pricey watch.
If the subject performs the action
To be followed by past participle
If the subject is receiving the action