Turkish Locative Case: -de, -da, -te, -ta Explained
How the Turkish locative suffix works — vowel harmony, consonant assimilation, the apostrophe with proper nouns, and why the separate word 'de' is not the same thing.
Ekle ·
The locative marks where something is — "in", "on", "at" — and it harmonises with the last vowel of the word it attaches to.
What the locative does
Turkish has no word for "in" or "at". It has a suffix that does the same work, glued directly onto the noun: evde is "at home". One suffix, four spellings, and which one you use is decided by two rules that never conflict.
It answers the question nerede — where?
Vowel harmony picks -de or -da
The suffix vowel copies the last vowel of the word it attaches to. göz ends in ö, a front vowel, so it takes gözde; yol ends in o, a back vowel, so it takes yolda.
| Last vowel | After a voiced sound | After p ç t k f h s ş |
|---|---|---|
| e · i · ö · ü | -de | -te |
| a · ı · o · u | -da | -ta |
Consonant assimilation picks -te or -ta
If the word ends in a voiceless consonant, the suffix hardens: d becomes t. The voiceless consonants are p ç t k f h s ş, and learners remember them with the sentence Fıstıkçı Şahap, a pistachio seller's name that contains every one of them.
Both rules apply at once and independently: assimilation chooses d or t, harmony chooses e or a. kitapta ends in the voiceless p, so t; its last vowel a is back, so a.
The four forms side by side
| Turkish | Parts | English |
|---|---|---|
| evde | ev + de | at home |
| okulda | okul + da | at school |
| kitapta | kitap + ta | in the book |
| işte | iş + te | at work |
The suffix -de versus the word de
- evde — one word. "At home."
- ev de — two words. "The house too."
- The separate de harmonises but never assimilates, so a standalone te is always wrong.
Proper nouns take an apostrophe
The suffix separates from a proper noun with an apostrophe, and both rules still apply across it: İstanbul'da, and Sinop'ta hardens because Sinop ends in p.
| Turkish | Parts | English |
|---|---|---|
| İstanbul'da | İstanbul + da | in Istanbul |
Clock time, months and years
The locative marks points in time as readily as points in space — but only some of them. Clock times, months and years take it.
| Turkish | Parts | English |
|---|---|---|
| saat üçte | saat üç + te | at three o'clock |
| mayısta | mayıs + ta | in May |
| 2026'da | 2026 + da | in 2026 |
- Parts of the day do not take it: sabahleyin, not sabahta.
- Seasons do not: kışın, not kışta.
- Weekdays do not: pazartesi günü, not pazarteside.
The buffer n after a possessive
When the locative follows a third-person possessive suffix, an n appears between them: evinde, not evide. Without the buffer the two vowels would collide, and the same n turns up in odasında and before the other case endings.
| Turkish | Parts | English |
|---|---|---|
| evinde | ev + i + n + de | in his house |
Frequently asked questions
- What is the difference between the suffix -de and the separate word de?
- The suffix de attaches to the word and means "in, on, at": evde means "at home". The separate word de means "too, also" and is always written with a space: ev de means "the house too". Only the suffix assimilates, so a separate de never becomes te.
- When does the locative become -te or -ta?
- After a voiceless consonant. If the word ends in p ç t k f h s ş, the suffix hardens: kitapta, işte. Otherwise it stays -de or -da.
- Why is it evinde and not evide?
- A buffer n appears between a third-person possessive suffix and any case ending. evinde is ev + i + n + de, "in his house".
- Is the locative used for time as well as place?
- For some kinds of time, yes: clock times, months and years take it — saat üçte, mayısta, 2026'da. Parts of the day, seasons and weekdays do not, and use their own forms instead: sabahleyin, kışın, pazartesi günü.