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.
Example: My bike 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.
Sometimes a statement in passive is more polite than active voice, as the following example shows:
Example: A mistake was made.
In this case, I focus on the fact that a mistake was made, but I do not blame anyone (e.g. You have made a mistake)

Form of Passive voice

O + be + V3 + by + S
ex: I was helped by her.

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

1. The object of the active sentence becomes the subject of the passive sentencethe finite form of
2. The verb is changed (to be + past participle / V3)
3. The subject of the active sentence becomes the object of the passive sentence (or is dropped)

Examples of Passive Voice

Simple Present
Active : George draws a flower.
Passive : A flower is drawn by George.

Simple Past
Active : George drew a flower.
Passive : A flower was drawn by George.

Present Perfect
Active : George has drawn a flower.
Passive : A flower has been drawn by George.

Past Perfect
Active : George had drawn a flower.
Passive : A flower had been drawn by George.

Present Progressive
Active : George is drawing a flower.
Passive : A flower is being drawn by George.

Past Progressive
Active : George was drawing a flower.
Passive : A flower was being drawn by George.

Simple Future
Active : George will draw a flower.
Passive : A flower will be drawn by George.

Past Future
Active : George would draw a flower.
Passive : A flower would be drawn by George.