PASSIVE VOICE

O + TO BE + V3

We use the passive voice when we want to focus on “what happened” (the action) rather than “who did it” (the subject).  We form the passive voice using a form of the verb “to be” and the past participle of the verb.  The passive can work in any tense; past, present or future.  If we want to tell the subject of verb, we normally use the word “by” after the verb.

Tenses	Active Voice	Passive Voice
Present Simple	Keeps	Is kept
Present Continuous	Is keeping	Is being kept
Past Simple	Kept	Was kept
Past Continuous	Was keeping	Was being kept
Present Perfect	Has kept	Has been kept
Past Perfect	Had kept	Had been kept
Present Future	Will keep	Will be kept
Conditional	Would keep	Would be kept
Perfect Conditional	Would have kept	Would have been kept
Present Infinitive	To keep	To be kept
Perfect Infinitive	To have kept	To have been kept
Present Participle/Gerund	Keeping	Being kept
Perfect Participle	Having kept	Having been kept

-          Prisoners of war built this bridge in 1942.Examples:

èThis bridge was built in 1942 by the prisoners of war.

-          Mrs. Rina cleans this room every day.

èThis room is cleaned every day.

-          I am studying English.

èEnglish is being studied by me.

-          They will sell their house.

èTheir house will be sold by them