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| Tense | Auxiliary verb |
|---|---|
| Present simple | do, does |
| Present continuous | am, are, is |
| Present perfect | have, has |
| Present perfect continuous | have been, has been |
| Past simple | did |
| Past continuous | was, were |
| Past perfect | had |
| Past perfect continuous | had been |
| Future simple | will, shall |
| Future continuous | will be, shall be |
| Future perfect | will have |
| Future perfect continuous | will have been |