PASSIVE VOICE 

Passive voice is used when the focus is on the action. It is not important or not known, however, who or what is performing the action.

Exmple: The book was stolen.

In the example above, the focus is on the fact that my bike was stolen. I do not know, however, who did it.

FORM OF PASSIVE VOICE:

Subject + finite form of to be + Past Participle

EXAMPLE:  The 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).