====== εἰμί ======
{{tag>greek}}
εἰμί is the first person singular verb for "to be" (εἶναι [the infinitive form] = "to be").

It an irregular verb, and, like English, changes significantly between person and tense. For example εἰμί is the word for am and ἦν is the word for was, e.g.
  * ἐγώ εἰμι ὁ ποιμήν ὁ καλός... “I am the good shepherd.” ([[:John 10:11|John 10:11]])
  * ὁ λόγος ἦν πρὸς τὸν θεόν... “The Word was with God.” ([[:John 1:1|John 1:1]])

The most common forms of "to be" in the New Testament are:
  * ἐστίν - 3rd person singular present indicative, e.g. "it is" or "he is", occurring around 900 times in the New Testament
  * ἦν - 3rd person singular imperfective indicative - "it was" or "he was"
  * εἰσίν or εἰσί - 3rd person plural present indicative - "they are"
  * εἰμί - 1st person singular present indicative - "I am" - occurring around 140 times in the New Testament
  * εἶναι (infinitive) - present infinitive - "to be"
  * ἐσμέν - 1st person plural present indicative - "we are"
  * ἐστέ - 2nd person plural present indicative - "you are"
  * ἦμεν - 3rd person plural imperfect indicative - "we were"
  * ἦσαν - 3rd person plural imperfect indicative - "they were"

===== Present Indicative Active =====

| Person       | Greek Pronoun        | Greek Form | English Translation |
| 1st singular | ἐγώ                  | εἰμί       | I am                |
| 2nd singular | σύ                   | εἶ         | You are (singular)  |
| 3rd singular | αὐτός / αὐτή / αὐτό  | ἐστίν      | He / she / it is    |
| 1st plural   | ἡμεῖς                | ἐσμέν      | We are              |
| 2nd plural   | ὑμεῖς                | ἐστέ       | You are (plural)    |
| 3rd plural   | αὐτοί / αὐταί / αὐτά | εἰσί(ν)    | They are            |

===== Imperfect Indicative Active =====

| Person       | Greek Pronoun        | Greek Form | English Translation |
| 1st singular | ἐγώ                  | ἦμην       | I was               |
| 2nd singular | σύ                   | ἦς         | You were (singular) |
| 3rd singular | αὐτός / αὐτή / αὐτό  | ἦν         | He / she / it was   |
| 1st plural   | ἡμεῖς                | ἦμεν       | We were             |
| 2nd plural   | ὑμεῖς                | ἦτε        | You were (plural)   |
| 3rd plural   | αὐτοί / αὐταί / αὐτά | ἦσαν       | They were           |

===== Future Indicative Active =====

| Person       | Greek Pronoun        | Greek Form    | English Translation    |
| 1st singular | ἐγώ                  | ἔσομαι        | I will be              |
| 2nd singular | σύ                   | ἔσῃ (or ἔσει) | You will be (singular) |
| 3rd singular | αὐτός / αὐτή / αὐτό  | ἔσται         | He / she / it will be  |
| 1st plural   | ἡμεῖς                | ἐσόμεθα       | We will be             |
| 2nd plural   | ὑμεῖς                | ἔσεσθε        | You will be (plural)   |
| 3rd plural   | αὐτοί / αὐταί / αὐτά | ἔσονται       | They will be           |