| Present | Imperfect | Future | |||
| Indic. | sg | 1 | εἰμί | ἤμην | ἔσομαι |
| 2 | εἶ | ἦς | ἔσῃ | ||
| 3 | ἐστί(ν) | ἦν | ἔσται | ||
| pl | 1 | ἐσμέν | ἦμεν | ἐσόμεθα | |
| 2 | ἐστέ | ἦτε | ἔσεσθε | ||
| 3 | εἰσί(ν) | ἦσαν | ἔσονται | ||
| Subj. | sg | 1 | ὦ | ||
| 2 | ᾖς | ||||
| 3 | ᾖ | ||||
| pl | 1 | ὦμεν | |||
| 2 | ἦτε | ||||
| 3 | ὦσι | ||||
| Imper. | sg | 2 | ἴσθι | ||
| 3 | ἔστω | ||||
| pl | 2 | ἔσθε | |||
| 3 | ἔστωσαν | ||||
| Infin. | εἶναι | ||||
| Part. | m | ὤν | |||
| f | οὖσα | ||||
| n | ὄν |