Turkish question words — the equivalents of who, what, where, when, why and how — work on a principle that feels backwards to English speakers but is beautifully systematic once you see it. The question word stays exactly where the answer would sit in the sentence, and it takes whatever case ending the answer would carry. So the form of the question word previews the grammar of the answer. This page introduces the main question words and their case behaviour; the deeper "stay in place" principle is drilled at wh-words stay in place.
The core inventory
| Question word | Meaning | Example |
|---|---|---|
| kim | who | Kim geldi? |
| ne | what | Ne istiyorsun? |
| nerede | where (at) | Neredesin? |
| nereye | where to | Nereye gidiyoruz? |
| nereden | where from | Nereden geliyorsun? |
| ne zaman | when | Ne zaman geldin? |
| neden / niçin / niye | why | Neden geldin? |
| nasıl | how | Nasıl gidiyoruz? |
| kaç | how many | Kaç tane? |
| ne kadar | how much | Ne kadar? |
| hangi | which | Hangi otobüs? |
A crucial difference from English: these words are not question particles and have nothing to do with the yes/no particle mI. A sentence with a question word like kim or ne is already a question — you do not add mI on top of it. Kim geldi mi? is wrong; Kim geldi? is right.
Ne istiyorsun?
What do you want?
Nereye gidiyoruz?
Where are we going?
Neden geldin?
Why did you come?
The big idea: the question word takes the answer's case
In English, "who" and "whom" barely differ, and "what" never changes shape. Turkish question words, by contrast, take case endings just like ordinary nouns — and the case is the one the answer will have. If the answer is a direct object, the question word is accusative; if it is a goal, the question word is dative; and so on. Reading the case on the question word tells you, in advance, the grammatical role of the thing being asked about.
Look at kim "who" across cases:
| Form | Case | Question | Answer pattern |
|---|---|---|---|
| kim | nominative (subject) | Kim geldi? | Ali geldi. |
| kimi | accusative (object) | Kimi gördün? | Ali'yi gördüm. |
| kime | dative (to whom) | Kime verdin? | Ali'ye verdim. |
| kimde | locative (at whom) | Kimde kaldı? | Ali'de kaldı. |
| kimden | ablative (from whom) | Kimden aldın? | Ali'den aldım. |
| kimin | genitive (whose) | Kimin arabası? | Ali'nin arabası. |
Kimi gördün?
Who(m) did you see?
Kime verdin?
Who did you give it to?
Bu kalem kimin?
Whose pen is this?
This is the single most important habit to build: before you ask a "who/what" question, decide what role the answer plays — subject, object, goal, source — and put that case on the question word. The case is not decoration; leaving it off changes or breaks the question.
ne "what" and its case forms with buffer -y-
Ne "what" follows the same rule, but its case forms have a spelling wrinkle. Ne ends in a vowel, so when a case ending that also begins with a vowel is added, Turkish inserts a buffer consonant -y- to keep two vowels apart. This gives the slightly irregular-looking accusative neyi and dative neye.
| Form | Case | Question |
|---|---|---|
| ne | nominative | Ne oldu? |
| neyi | accusative | Neyi arıyorsun? |
| neye | dative | Neye güldün? |
| nede | locative (rare) | Nede karar kıldın? |
| neden | ablative | Neden korkuyorsun? |
Neyi arıyorsun?
What are you looking for?
Neye güldün?
What did you laugh at?
Watch the overlap: the ablative of ne is neden, which is also the word for "why". Context disambiguates — Neden korkuyorsun? can be "what are you afraid of?" (ablative, -den "from") or "why are you afraid?" depending on the verb and situation. The dedicated "why" words and their nuances are covered at why: neden, niye, niçin.
The "where" trio: nerede, nereye, nereden
English uses one word "where" and adds prepositions ("where to", "where from"). Turkish bakes the direction into three distinct forms, built on the root nere- plus the locative, dative and ablative endings — exactly the three spatial cases.
Çantam nerede?
Where is my bag?
Bu yaz nereye gidiyorsun?
Where are you going this summer?
Bu güzel kokular nereden geliyor?
Where are these lovely smells coming from?
Choosing among them is just choosing the case the answer needs: nerede for a static location ("at the office"), nereye for a destination ("to the office"), nereden for an origin ("from the office"). Pick the one that matches the verb — gitmek "to go" wants a destination, so nereye; gelmek "to come" implies an origin, so often nereden.
Quantity and choice: kaç, ne kadar, hangi
Kaç "how many" is used with countables and is followed directly by a singular noun (Turkish does not pluralize the noun after a number-question): kaç kişi? "how many people?". Ne kadar "how much" covers uncountable amount, degree, and price. Hangi "which" selects from a known set and, like kaç, sits before a singular noun.
Bu kaç para?
How much is this? (lit. how much money)
Sınıfta kaç öğrenci var?
How many students are there in the class?
Hangi otobüse bineceğiz?
Which bus are we going to get on?
Note that hangi itself doesn't take the case — the noun after it does: hangi otobüse "to which bus" carries the dative on otobüs, not on hangi. The question word and its noun work as a unit, and the unit takes the case.
Manner and reason: nasıl, ne zaman
Nasıl "how" asks about manner or condition, and also serves as "what … like": Hava nasıl? "what's the weather like?". Ne zaman "when" is literally "what time" and behaves as a fixed phrase.
İstanbul'a nasıl gideceğiz, otobüsle mi?
How are we going to get to Istanbul, by bus?
Tatilden ne zaman döneceksin?
When will you get back from the holiday?
Common mistakes
❌ Kim gördün?
Incorrect — the answer is a direct object, so the question word needs the accusative.
✅ Kimi gördün?
Who(m) did you see?
Because the answer ("Ali'yi") is an object, the question word must be kimi, not bare kim. Bare kim is for subjects (Kim geldi?).
❌ Nere gidiyorsun?
Incorrect — 'going' needs a destination, so the dative form nereye.
✅ Nereye gidiyorsun?
Where are you going?
There is no bare nere in standard usage; you must pick nerede / nereye / nereden to match the verb's direction.
❌ Ne istiyorsun mu?
Incorrect — a wh-word is already a question; don't add the mI particle.
✅ Ne istiyorsun?
What do you want?
Question words and the yes/no particle mI do not combine. A sentence with ne, kim, nerede etc. is already a question on its own.
❌ Ne arıyorsun?
Incomplete for a definite object — a specific, known thing being sought takes neyi.
✅ Neyi arıyorsun?
What (specific thing) are you looking for?
When the answer is a definite, specific object, ne takes the accusative buffer form neyi. Bare ne arıyorsun? asks more generally ("what are you after?"); neyi arıyorsun? asks about a particular item.
Key takeaways
- Turkish question words inflect for case, and they take the case the answer would have: kim / kimi / kime / kimden ….
- A question word is already a question — never add the yes/no particle mI to it.
- Ne "what" inserts a buffer -y- before vowel-initial endings: neyi, neye.
- "Where" splits into nerede / nereye / nereden by direction; choose the one the verb needs.
- Kaç and hangi sit before a singular noun, and the noun (not the question word) carries any case ending.
Now practice Turkish
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Turkish→Related Topics
- Wh-Words Stay In PlaceA2 — The in-situ principle: Turkish question words sit in the exact slot the answer would fill — usually the preverbal focus position — with no fronting as in English.
- Question Pronouns: kim, ne, hangiA1 — The interrogative pronouns and determiners kim 'who,' ne 'what,' hangi 'which,' nere 'where,' kaç 'how many' and ne kadar 'how much' — which stay in place and take exactly the case their answer would take.
- Why: neden, niçin, niyeB1 — Turkish has three words for 'why' — neden, niçin, and niye — that share a meaning but differ in register, plus how to answer with çünkü or -DIK için.
- Asking Questions: Three ToolsA1 — The three ways Turkish builds questions — the particle mI, question words, and intonation — none of which involve inverting word order.