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Passive voice

Passive - Explanations

Passive - Use

We only use the passive when we are interested in the object or when we do not know who caused the action.
Example: Appointments are required in such cases.
We can only form a passive sentence from an active sentence when there is an object in the active sentence.

Form

to be + past participle
How to form a passive sentence when an active sentence is given:
- object of the "active" sentence becomes subject in the "passive" sentence
- subject of the "active" sentence becomes "object" in the "passive" sentence" (or is left out)

Active: Peter builds a house.

Passive: A house is built by Peter

Examples

Active Peter builds a house. Simple Present

Passive: A house is built by Peter.

Active:Peter built a house. Simple Past

Passive:A house was built by Peter.

Active:Peter has built a house. Present Perfect

Passive:A house has been built by Peter.

Active:Peter will build a house. will-future

Passive:A house will be built by Peter.

Active:Peter can build a house. Modals

Passive: A house can be built by Peter