When we want to express that something happens to the subject, we use the
passive. It is usually not so important or unknown who or what caused the action.
Compare: The Haydn cinema shows English films active
English films are shown at the Haydn cinema passive
The passive is formed with the verb "to be" and the past participle (3.Form)
The shopping mall will be opened in spring 2001.
The waiting room is cleaned every day.
Yesterday I was invited to an interesting party.
The tense always remains the same as in the active: Study the following
1. present simple: am/are/is + participle
2. present continuous: am/are/is + being + participle
3. present perfect simple: has/have + been + participle
4. past simple: was/were + participle
5. past progressive: was/were + being + participle
6. past perfect simple: had + been + participle
7. conditional I (would, could, ...): conditional I + be + participle
8. Conditional II (would have, ...): conditional II + been + participle
9. will-future: will + be + participle
10.future perfect: will + have + been + participle
11.modals (may, must, ...): modal + be + participle