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The following chart shows how the passive voice is formed.
| Simple present | am, is are | created |
| Simple past | was, were | flown |
| Simple future | shall/will + be | filled |
| Present continuous | am, is, are + being | sent |
| Past continuous | was, were + being | formed |
| Present perfect | has been, have been | taken |
| Past perfect | had been | brought |
| Future perfect | shall/will have been | found |