Finnish Question Words and Sentences: A Complete Guide

Asking questions is one of the first practical skills you need in any language. In Finnish, forming questions is straightforward in some ways — and surprising in others. Finnish does not use auxiliary verbs like "do" or "does" to form questions (as English does). Instead, it uses question particles, question words, and specific sentence structures that follow their own clear logic. This guide covers everything: yes/no questions, information questions with question words, indirect questions, negative questions, and the nuances of formal versus informal Finnish questioning.

Two Types of Questions

Like other languages, Finnish has two fundamental question types:

1. Yes/no questions — answered with yes (kyllä/joo) or no (ei): "Do you speak Finnish?"
2. Information questions (wh-questions) — require specific information as an answer, introduced by a question word: "Where do you live?"

Each type has its own structure in Finnish.

Yes/No Questions: The -ko/-kö Question Particle

Finnish forms yes/no questions by adding the question particle -ko (or its front-vowel harmony variant -kö) to the verb in the question:

• Puhutko suomea? — Do you speak Finnish? (puhua → puhut + -ko)
• Asuuko hän Helsingissä? — Does he/she live in Helsinki?
• Onko sinulla aikaa? — Do you have time? (literally: Is there time on you?)
• Tuleeko hän tänään? — Is he/she coming today?
• Syöttekö kaikki? — Are you all eating?

The question particle is added to the finite (conjugated) verb. Vowel harmony determines whether it's -ko (with back vowels a, o, u) or -kö (with front vowels ä, ö, y):

• Puhut (back vowels) → Puhutko? (-ko)
• Syöt (front vowel ö) → Syötkö? (-kö)
• Odotat (back vowel a) → Odotattko? Wait — odotat → Odotatko? (-ko)

The Particle Moves to the Topic

An important feature: the -ko/-kö particle attaches to whichever word is being questioned. If you want to ask "Is it coffee you want (rather than tea)?", you move -ko to the word being emphasised:

• Haluatko kahvia? — Do you want coffee? (questioning the whole event)
• Kahviako haluat? — Is it coffee you want? (questioning which drink — coffee specifically)
• Siinäkö se on? — Is that where it is? (questioning the location)

This flexibility means -ko/-kö can in principle attach to any word to form a question about that specific element.

Answering Yes/No Questions

Finnish has several ways to say yes and no:

Yes:

• Kyllä — yes (formal/standard)
• Joo — yeah / yes (informal, very common in speech)
• Jep — yep (very informal)

No:

• Ei — no (also the third-person singular of the negative verb)

A natural way to answer positively in Finnish is to repeat the verb:

• Puhutko suomea? — Puhun. (Do you speak Finnish? — I speak [it]. = Yes.)
• Onko sinulla auto? — On. (Do you have a car? — There is [one]. = Yes.)
• Tuleeko Matti? — Tulee. (Is Matti coming? — He's coming. = Yes.)

For negative answers, use ei + the connective verb form:

• Puhutko suomea? — En puhu. (I don't speak [it]. = No.)
• Onko sinulla auto? — Ei ole. (There isn't [one]. = No.)

Finnish Question Words

Information questions use question words (kysymyssanat). Here are all the major ones:

• kuka — who — used for people
• mikä — what — used for things/concepts
• kumpi — which (of two) —
• millainen — what kind of —
• missä — where (location) — inessive of mikä
• minne / mihin — where (direction/to) — allative/illative
• mistä — where from — elative
• milloin / koska — when —
• miksi — why —
• miten / kuinka — how —
• kuinka paljon — how much —
• kuinka monta — how many —
• minkä / minkälainen — what kind (genitive) —

Kuka — Who

Kuka is used for people. It declines like other question words in cases:

• Nominative — kuka — Kuka hän on? — Who is she?
• Genitive — kenen — Kenen kirja tämä on? — Whose book is this?
• Partitive — ketä — Ketä odotat? — Who are you waiting for?
• Inessive — kenessä — Kenessä on vika? — Who is at fault?
• Elative — kenestä — Kenestä puhutte? — Who are you talking about?
• Allative — kenelle — Kenelle annat sen? — Who are you giving it to?
• Adessive — kenellä — Kenellä on avaimet? — Who has the keys?
• Ablative — keneltä — Keneltä sait sen? — Who did you get it from?
• Translative — keneksi — Keneksi hän luulee olevansa? — Who does he think he is?

Plural who: ketkä (nominative plural), keitä (partitive plural):

• Ketkä tulevat? — Who is coming? (multiple people)
• Keitä he ovat? — Who are they?

Mikä — What

Mikä is used for things, concepts, and identifying. It also declines through all cases:

• Nominative — mikä — Mikä tämä on? — What is this?
• Genitive — minkä — Minkä otat? — Which one do you take?
• Partitive — mitä — Mitä sinä teet? — What are you doing?
• Inessive — missä — Missä hän on? — Where is he/she?
• Elative — mistä — Mistä tulet? — Where are you from?
• Illative — mihin — Mihin menet? — Where are you going?
• Adessive — millä — Millä menet töihin? — How do you get to work?
• Ablative — miltä — Miltä se maistuu? — What does it taste like?
• Allative — mille — Mille se sopii? — What is it suitable for?
• Translative — miksi — Miksi hän tuli? — Why did he come? (also "why")
• Essive — minä — Minä hän toimii? — In what capacity does he work?

Notice how the case forms of mikä serve as many of the key question words:

• missä (inessive of mikä) → where (location)
• mistä (elative) → where from
• mihin (illative) → where to
• miksi (translative) → why / what into

This is one of the most elegant aspects of Finnish question words — they are simply mikä in different cases.

Milloin / Koska — When

• Milloin tulet? — When are you coming?
• Koska hän saapuu? — When does he arrive?
• Milloin syntymäpäiväsi on? — When is your birthday?

Both milloin and koska mean "when" in questions. Koska also means "because" in statements, so context distinguishes the two uses.

Miten / Kuinka — How

• Miten menee? — How is it going? / How are you?
• Kuinka pitkä matka on? — How long is the journey?
• Miten sanot sen suomeksi? — How do you say that in Finnish?
• Kuinka usein käyt siellä? — How often do you go there?

Kuinka paljon (how much) and kuinka monta (how many) are common compound question words:

• Kuinka paljon se maksaa? — How much does it cost?
• Kuinka monta lasta teillä on? — How many children do you have?

Millainen — What Kind Of

Millainen asks about the nature or quality of something. It agrees with the noun it asks about:

• millainen — common singular: Millainen hän on? — What is she like?
• millaista — partitive: Millaista kahvia haluatte? — What kind of coffee do you want?
• millaisia — partitive plural: Millaisia ihmisiä hän on? — What kind of people are they?
• millaisen — genitive: Millaisen auton osit? — What kind of car did you buy?

• Millainen sää siellä on? — What is the weather like there?
• Millaista työtä teet? — What kind of work do you do?

Word Order in Information Questions

Finnish question word sentences place the question word first, followed by the verb, then the subject (if not the question word) and other elements:

• Missä sinä asut? — Where do you live?
• Mitä he tekevät? — What are they doing?
• Kenelle annat kirjan? — Who are you giving the book to?
• Miksi hän ei tullut? — Why didn't he come?
• Kuinka kauan matka kestää? — How long does the journey take?

The subject follows the verb (similar to yes/no questions in Finnish), though in informal speech the subject often comes first:

• Mitä sinä teet? (formal) = Mitä sä teet? (informal)

Indirect Questions

Indirect questions (embedded within a statement) use -ko/-kö or the question word, followed by subordinate clause word order (verb after subject and adverbs):

• Tiedätkö, missä hän asuu? — Do you know where he lives?
• Hän ei tiedä, koska juna tulee. — He doesn't know when the train is coming.
• Kysy, haluaako hän kahvia. — Ask if he wants coffee.
• En muista, mitä sanoin. — I don't remember what I said.

Negative Questions

Negative questions use the negative verb + -ko/-kö:

• Etkö puhu suomea? — Don't you speak Finnish? (et + -ko)
• Eikö hän tule? — Isn't he coming? (ei + -kö)
• Emmekö lähde jo? — Aren't we leaving yet? (emme + -kö)

Negative questions in Finnish can imply surprise, disbelief, or a request for confirmation — much like in English.

Polite and Formal Questions

Finnish has a polite form using the second-person plural (te-form) to address one person respectfully:

• Puhutteko englantia? — Do you (formal) speak English?
• Mistä tulette? — Where are you (formal) from?
• Mitä haluaisitte? — What would you (formal) like?

The -tte verb ending (2nd plural) is used for a single person in formal contexts: in shops, with elderly people, with officials. In informal situations, the 2nd singular (sinä-form) is used for everyone.

Common Everyday Questions

• Mitä kuuluu? — How are you? (What's new?)
• Missä olet? — Where are you?
• Mitä teet? — What are you doing?
• Kuka soitti? — Who called?
• Milloin tulet kotiin? — When are you coming home?
• Miksi et vastannut? — Why didn't you answer?
• Kuinka paljon se on? — How much is it?
• Mistä olet kotoisin? — Where are you from?
• Puhutko englantia? — Do you speak English?
• Mikä sinun nimesi on? — What is your name?
• Haluatko kahvia vai teetä? — Do you want coffee or tea?

Summary

• Yes/no — verb + -ko/-kö — Puhutko?
• Who — kuka (declines in cases) — Kuka tulee?
• What — mikä (declines in cases) — Mitä teet?
• Where (location) — missä — Missä asut?
• Where (from) — mistä — Mistä tulet?
• Where (to) — mihin/minne — Mihin menet?
• When — milloin/koska — Milloin tulet?
• Why — miksi — Miksi itket?
• How — miten/kuinka — Miten menee?
• What kind — millainen (agrees with noun) — Millainen se on?
• How much — kuinka paljon — Kuinka paljon maksaa?
• Indirect — question word + -ko/-kö in subordinate — Tiedän, missä hän on.

Finnish questions are built on clear, learnable patterns. The -ko/-kö particle and the case-based question words are your two main tools, and once you've mastered them together with the case system, you can ask virtually anything in Finnish with confidence. Onnea opiskeluun!