Czasownik 'to be' jest czasownikiem nieregularnym w każdym języku. Oznacza to, że jego formy dla każdej osoby nie możne przewidzieć w oparciu o jakąś logiczną konstrukcję morfologiczną. Odmiana "TO BE" wygląda następująco:
| Liczba pojedyńcza | |
| I | am |
| you | are |
| he | is |
| she | is |
| it | is |
| Liczba mnoga | |
| we | are |
| you | are |
| they | are |
Czasownik "BE" zaprzecza się poprzez dodanie NOT po czasowniku np:
- He is NOT at home.(Nie ma go w domu)
- I'm NOT a doctor. (Nie jestem lekarzem)
Czasownikiem "BE" buduje się również pytania w zdaniach gdzie jest on głównym czasownikiem zdania.
| Liczba pojedyńcza | |
| Am | I ? |
| Are | you? |
| Is | he? |
| Is | she? |
| Is | it? |
| Liczba mnoga | |
| Are | we? |
| Are | you? |
| Are | they? |
Czasownik "to be" we wszystkich czasach i osobach
| Present Simple | |
| I | am |
| you | are |
| he | is |
| she | is |
| it | is |
| we | are |
| you | are |
| they | are |
| Present Continuous | |
| I | am being |
| you | are being |
| he | is being |
| she | is being |
| it | is being |
| we | are being |
| you | are being |
| they | are being |
| Past Simple | |
| I | was |
| you | were |
| he | was |
| she | was |
| it | was |
| we | were |
| you | were |
| they | were |
| Past Continuous | |
| I | was being |
| you | were being |
| he | was being |
| she | was being |
| it | was being |
| we | were being |
| you | were being |
| they | were being |
| Present Perfect | |
| I | have been |
| you | have been |
| he | has been |
| she | has been |
| it | has been |
| we | have been |
| you | have been |
| they | have been |
| Present Perfect Continuous | |
| forma | have been being albo has been being |
| prawie nie występuje | |
| Past Perfect | |
| I | had been |
| you | had been |
| he | had been |
| she | had been |
| it | had been |
| we | had been |
| you | had been |
| they | had been |
| Past Perfect Continuous | |
| forma | had been being |
| prawie nie występuje | |
| Future Simple | |
| I | will be |
| you | will be |
| he | will be |
| she | will be |
| it | will be |
| we | will be |
| you | will be |
| they | will be |
| Future Continuous | |
| forma | will have been being |
| nie występuje | |
| Future Perfect | |
| I | will have been |
| you | will have been |
| he | will have been |
| she | will have been |
| it | will have been |
| we | will have been |
| you | will have been |
| they | will have been |
Źródło: http://www.tlumaczenia-angielski.info/angielski/odmiana-to-be.htm