Question Formation in Finnish

Overview

Finnish has two main types of questions: yes/no questions and information questions (wh-questions). Both are essential from the A1 level and are used in every conversation. The yes/no question system is particularly distinctive — instead of changing word order like English does, Finnish adds a question particle -ko/-kö directly to the verb.

Information questions use question words (interrogatives) that are similar in function to English "what," "where," "when," and "how." Finnish question words often encode case information, which means the question word itself tells you about location, direction, or other grammatical relationships.

Learning to form questions fluently is one of the fastest ways to start real conversations in Finnish, so this is a high-priority topic for beginners.

How It Works

Yes/no questions with -ko/-kö

Add the question particle to the verb, which moves to the beginning of the sentence:

Statement	Question
Sinä puhut suomea.	Puhutko suomea? (Do you speak Finnish?)
Hän on suomalainen.	Onko hän suomalainen? (Is he/she Finnish?)
Te asutte Helsingissä.	Asutteko Helsingissä? (Do you live in Helsinki?)

The choice between -ko and -kö follows vowel harmony:

• Back-vowel verbs: -ko (puhutko, asutko, onko)
• Front-vowel verbs: -kö (näetkö, syötkö)

Question words (interrogatives)

Finnish	English	Example
mikä	what (subject/predicate)	Mikä tämä on? (What is this?)
mitä	what (partitive)	Mitä sinä teet? (What are you doing?)
kuka	who	Kuka hän on? (Who is he/she?)
missä	where (at)	Missä sinä asut? (Where do you live?)
mistä	where from	Mistä sinä tulet? (Where do you come from?)
mihin / minne	where to	Mihin sinä menet? (Where are you going?)
milloin	when	Milloin tulet? (When are you coming?)
miten / kuinka	how	Miten voit? (How are you?)
miksi	why	Miksi olet myöhässä? (Why are you late?)
paljonko	how much	Paljonko tämä maksaa? (How much does this cost?)
kumpi	which (of two)	Kumpi on parempi? (Which is better?)

Word order in questions

• Yes/no questions: Verb + ko/kö moves to the front: Puhutko suomea?
• Information questions: Question word comes first, verb follows: Missä sinä asut?
• The subject can come before or after the verb in information questions.

Answering yes/no questions

Question	Yes	No
Puhutko suomea?	Kyllä. / Puhun.	En. / En puhu.
Onko hän kotona?	On. / Kyllä, on.	Ei. / Ei ole.

Note: Finnish often answers by repeating the verb in affirmative or negative form rather than using a separate word for "yes."

Examples in Context

Finnish	English	Note
Puhutko suomea?	Do you speak Finnish?	-ko question
Missä sinä asut?	Where do you live?	Location (inessive)
Mikä sinun nimesi on?	What is your name?	Subject question
Miten voit?	How are you?	Manner question
Onko tämä sinun?	Is this yours?	-ko with olla
Mitä teet viikonloppuna?	What are you doing on the weekend?	Partitive what
Kuka tuo nainen on?	Who is that woman?	Person question
Milloin kauppa sulkeutuu?	When does the store close?	Time question
Miksi et tullut eilen?	Why didn't you come yesterday?	Reason question
Paljonko kello on?	What time is it?	Lit. "How much is the clock?"
Tykkäätkö jäätelöstä?	Do you like ice cream?	-kö (front vowels)
Mihin menet lomalla?	Where are you going on vacation?	Direction question

Common Mistakes

Forgetting to move the verb to the front

• Wrong: Sinä puhutko suomea?
• Right: Puhutko sinä suomea? or simply Puhutko suomea?
• Why: In yes/no questions, the verb with -ko/-kö must come first. The subject pronoun, if included, follows the verb.

Using the wrong "what" (mikä vs. mitä)

• Wrong: Mikä sinä teet?
• Right: Mitä sinä teet?
• Why: Mikä is the nominative form (used for "what is this?"), while mitä is the partitive form (used when "what" is the object of a verb).

Answering with "kyllä" or "ei" only

• Wrong: Believing kyllä and ei are always sufficient
• Right: Often repeat the verb: Puhutko suomea? — Puhun. or — En puhu.
• Why: While kyllä (yes) and ei (no) work, Finnish speakers more naturally echo the verb form. This also avoids ambiguity.

Wrong vowel harmony on -ko/-kö

• Wrong: Syötkö using -ko → Syötko
• Right: Syötkö
• Why: Verbs with front vowels (ä, ö, y) take -kö, not -ko. Follow standard vowel harmony rules.

Practice Tips

1. Question word cards: Make flashcards with all Finnish question words. On the back, write the English meaning and an example question. Review daily until automatic.
2. Conversation starters: Memorize 5 essential questions for meeting people: Mikä sinun nimesi on? Mistä sinä tulet? Mitä sinä teet työksesi? Puhutko englantia? Miten voit? Use these to start real conversations.
3. Transform drill: Take any statement and convert it into both a yes/no question and an information question. Example: Hän asuu Helsingissä → Asuuko hän Helsingissä? → Missä hän asuu?

Related Concepts

• Prerequisite: Present Tense — you need to know verb forms to add -ko/-kö