Finnish Questions: -ko/-kö and Question Words

Asking a question in Finnish is not about intonation or word order the way it is in English. There is no "do" and no "is/are" helper. Instead Finnish has two clean tools: a little particle -ko/-kö that turns any statement into a yes/no question, and a set of question words (kuka, mikä, missä…) that open information questions. Learn how these two work — and how to answer them — and you can ask almost anything from your first week.

Two kinds of questions

Every question is one of two types, and Finnish builds them differently:

• Yes/no questions ("Do you…?", "Is it…?") — take the statement and add -ko/-kö to the fronted word, normally the verb.
• Information questions ("Who…?", "Where…?", "When…?") — start with a question word and do not take -ko/-kö.

Getting these two apart is the whole game. Let's take them in order.

Yes/no questions: the -ko/-kö particle

To ask a yes/no question, move the verb to the front of the sentence and attach -ko/-kö to it. Nothing else changes.

Notice there is no extra helper verb — Puhutko? already means "Do you speak?". The pronoun (sinä, te) can even be dropped, because the verb ending shows the person, exactly as in Finnish personal pronouns: Puhutko suomea? is completely natural on its own.

Which one — -ko or -kö?

The choice is pure vowel harmony. Words with back vowels (a, o, u) take -ko; words with front vowels (ä, ö, y) take -kö; and if the word has only the neutral vowels e and i, it defaults to -kö.

Word order: which word gets -ko?

Here is the elegant part. The word that carries -ko/-kö is the one you are actually asking about. A neutral yes/no question fronts the verb. But move the particle onto another word, and you shift the focus of the question:

• Puhutko sinä suomea? — neutral: "Do you speak Finnish?"
• Sinäkö puhut suomea? — "Is it you who speaks Finnish?"
• Suomeako sinä puhut? — "Is it Finnish you speak?"
• Tänäänkö te lähdette? — "Is it today you leave?"

So Finnish keeps a fairly free order, and the particle marks the point of the question. If you want the bigger picture of how the sentence lines up, see Finnish word order.

Question words

Information questions open with a question word. The tricky habit to build is that many of these words already carry a case ending — the same case the answer will use. "Where do you live?" is asked with the inessive missä ("in what"), and you answer in the inessive: Helsingissä.

Two more you'll meet constantly: paljonko / kuinka paljon ("how much") — Paljonko tämä maksaa? ("How much does this cost?") — and mitä, the partitive of mikä, used for "what" as an object: Mitä sinä teet? ("What are you doing?").

mikä or kuka?

Use kuka only for people, and mikä for things — and, importantly, for asking about someone's profession: Mikä sinä olet ammatiltasi? ("What do you do for a living?"). Saying Kuka sinä olet ammatiltasi? is a classic beginner slip. Both words decline, so you'll see forms like kenen ("whose"), kenelle ("to whom"), millä ("with what") depending on the case the sentence needs — the same case logic covered in the Finnish cases.

Place questions: at, from, to

Finnish splits "where" into three, matching its local cases, so the question word already tells you the direction:

• Missä = where (static) — Missä sinä asut? → Asun Turussa.
• Mistä = from where — Mistä sinä olet kotoisin? → Olen Espoosta.
• Minne / mihin = to where — Minne sinä menet? → Menen kauppaan.

Answering questions

This surprises English speakers: Finns usually answer a yes/no question by repeating the verb, not by saying "yes". Kyllä ("yes") and its casual cousin joo exist, but the verb echo is the natural core of the answer. For "no", you need the conjugating negative verb ei plus the short verb form.

The negative answer follows the full en, et, ei, emme, ette, eivät pattern — if that's new, read Finnish negation first, because half of "answering" is really just negation. Information questions, of course, are answered with the information: Missä asut? — Helsingissä.

Questions in spoken Finnish: -ks

In everyday speech the ending -ko/-kö shrinks to -ks, and the pronoun often melts into the verb. This is why real Finnish sounds nothing like the textbook at first:

You should recognise these long before you produce them. The gap between the written and spoken systems is worth a whole article on its own — see spoken vs written Finnish.

Common mistakes

• Forgetting -ko/-kö. A yes/no question needs the particle — you can't just add a question mark like in English. Not Sinä puhut suomea? but Puhutko sinä suomea?
• Putting -ko on the wrong word. A neutral yes/no question puts it on the verb. Attaching it elsewhere shifts the focus, which may not be what you mean.
• Mixing up mikä and kuka. Use kuka for people only; use mikä for things and for professions: Mikä sinä olet ammatiltasi?
• Wrong place-case. Keep missä (at), mistä (from) and minne (to) apart: Missä asut?, never Minne asut?
• montako + plural. After montako the noun is partitive singular: Montako lasta?, not montako lapset.
• Double-marking. A question word already asks, so don't add -ko to it: Missä asut?, not Missäkö asut? (that would be an echo, "you mean where?").

Questions are where Finnish grammar turns into real conversation — the moment you can ask, you can learn from every Finn around you. We drill exactly this, questions and quick natural answers, from the very first lesson on our Finnish conversation gym, with a live teacher fixing your -ko and your intonation on the spot. Starting from zero? The Finnish-from-zero course builds these question patterns in gradually alongside your first words. And once you can ask, linking your questions and answers together comes next — see Finnish conjunctions — while the survival phrases in Finnish phrases for beginners give you ready-made questions to use today.

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