Turkish Past Tense: -di, -dı, -du, -dü Explained
How the Turkish definite past works — four-way vowel harmony, consonant assimilation, the person endings, and how it differs from the reported past.
Ekle ·
The definite past reports something as established fact — the speaker states it directly, rather than passing on what they were told.
What the definite past does
Turkish has two past tenses, and choosing between them is a claim about how you know. This one is the witnessed past: Dün geldi means "he came yesterday, and I can vouch for that".
It attaches straight to the verb stem, and it takes eight shapes — four vowels times two consonants — all of them predictable.
Four-way vowel harmony
The suffix vowel copies the last vowel of the stem. This suffix uses the four-way pattern, so there are four vowels to choose between rather than two.
| Last vowel | After a voiced sound | After p ç t k f h s ş |
|---|---|---|
| a · ı | -dı | -tı |
| e · i | -di | -ti |
| o · u | -du | -tu |
| ö · ü | -dü | -tü |
okumak has u as its last vowel, so the suffix is -du: okudum. görmek has ö, so the vowel is ü: gördüm.
Consonant assimilation
If the stem ends in a voiceless consonant — p ç t k f h s ş — the suffix hardens from d to t. bakmak ends in k, so its past is baktık.
gitmek ends in t, which is itself voiceless, so it takes the hardened form and the two t's meet: gittiniz, never gitdi. The doubled letter is the stem's t plus the suffix's, not a separate rule.
The person endings
Person is marked after the tense suffix, and these endings belong to this tense specifically: -m, -n, nothing for third person, -k, -niz, -ler.
- gördüm — I saw
- gördün — you saw
- gördü — he, she or it saw
- gördük — we saw
- gördünüz — you (plural or formal) saw
- gördüler — they saw
Worked examples
| Turkish | Parts | English |
|---|---|---|
| gördüm | gör + dü + m | I saw |
| geldi | gel + di | he came |
| baktık | bak + tı + k | we looked |
| gittiniz | git + ti + niz | you went |
| okudum | oku + du + m | I read |
Choosing this past over the other one
Turkish makes you commit. Use this tense for what you witnessed or did yourself; use the reported past for what you were told, inferred, or discovered after the fact. Neither is more polite — they carry different claims, and picking the wrong one says something you did not mean.
It is the reported past that does the work here. This tense does not announce "I was there" so much as decline to say "I heard it from someone" — which is why it is also the tense of history and of the news, where nobody claims to have witnessed anything.
Negation goes before the tense
The negative suffix sits between the stem and the tense, not after it: görmedim is gör + me + di + m. The tense suffix then harmonises with the negative suffix's vowel rather than with the stem's, which is why it is -di here and not -dü.
| Turkish | Parts | English |
|---|---|---|
| görmedim | gör + me + di + m | I did not see |
Frequently asked questions
- What does the Turkish -di suffix mean?
- It marks the definite past: something happened, and the speaker vouches for it first-hand. gördüm is "I saw", built from gör + dü + m.
- When does -di become -ti?
- After a voiceless consonant. If the stem ends in p ç t k f h s ş, d hardens to t: baktık, gittiniz. The vowel is chosen separately, by four-way vowel harmony.
- What is the difference between the -di past and the -mis past?
- They differ in how the speaker knows. The -di past claims first-hand knowledge — you saw it or did it. The -mis past reports something heard, inferred or noticed afterwards. Turkish requires you to choose, so the wrong one makes a claim you did not intend.