idi

The past copula idi hissəciyi is a universal past auxiliary that can attach to verbs to form complex tenses, but this lesson focuses on its use as the 'witnessed' past marker for non-verbal predicates. It indicates that the speaker knows the past state to be a fact.

1. The Standalone and Suffix Forms
In standard Azerbaijani formal writing, the past copula usually appears as the standalone word idi after nouns, adjectives, numerals, and pronouns. The standalone form is invariable and does not change according to vowel harmony. The suffixed form is a representation of speech, also found in literary dialogue and poetry:

• uşaq idi (he was a child - formal/standard)
• həkim idi (he was a doctor - formal/standard)
• soyuq idi (it was cold - formal/standard)

When used as a suffix in informal contexts, it follows vowel harmony rules and attaches directly to words ending in a consonant (e.g., uşaq + -dı becomes uşaqdı). Importantly, the suffix is spelled with d in these forms; this spelling rule does not exclude phonetic assimilation in speech (it remains uşaqdı, not uşaqtı). Also, the suffix form never takes the stress; the original lexical stress is retained; it is not moved to the last stem syllable if the word already has non-final stress. Note on spoken Azerbaijani: In everyday speech, the 3rd-person present tense copula drops the 'r' (O uşaqdır becomes O uşaqdı), making it an exact homophone with the past copula (O uşaq idi also becomes O uşaqdı). This homophony is limited to the 3rd person; the 1st and 2nd persons remain distinctly different. You must rely on context to distinguish 'is' from 'was' for 3rd-person consonant-ending words.

2. The Buffer 'y'
If the noun or adjective ends in a vowel and you use the informal suffix form, a buffer 'y' is required: tələbə + -di becomes tələbəydi (he was a student), and güclü + -dü becomes güclüydü (he was strong).

3. Personal Endings
Personal markers attach directly to the copula. For the standard standalone form, they attach to idi (e.g., Mən tələbə idim, Sən tələbə idin, O tələbə idi, Biz tələbə idik, Siz tələbə idiniz, Onlar tələbə idilər). For the informal/spoken suffix form, they attach to the suffixed copula:

• Mən tələbəydim (I was a student - spoken/informal)
• Sən tələbəydin (You were a student - spoken/informal)
• O tələbəydi (He/she was a student - spoken/informal)
• Biz tələbəydik (We were students - spoken/informal)
• Siz tələbəydiniz (You all were students - spoken/informal)
• Onlar tələbəydilər (They were students - spoken/informal)

4. Negation and Questions
To negate a past state, use deyil followed by the copula: tələbə deyildi (he was not a student). For questions, the interrogative particle is placed after the personal ending when using the suffix form: tələbəydimi? (was he a student?), Sən tələbəydinmi? (Were you a student?). If you use the standalone form, the question particle attaches directly to idi: tələbə idimi? (Note: attaching it to the noun, as in tələbəmi idi?, puts the focus on that word, so it is not the plain question). For a negative question, combine both: tələbə deyildimi? (was he not a student?).

Reported Information:
Idi and imiş differ in how information is presented, not simply whether the speaker heard it. Eşitdim ki, o, həkim idi is grammatical; the main clause already identifies the source of knowledge. Imiş can add a reported or newly discovered perspective.