istua ('to sit') | Finnish Grammar

Istua means "to sit" — to be in a seated position. It is a fully regular Type 1 verb with the ungradating stem istu-, so it conjugates just like puhua or asua. The one thing English speakers must unlearn is that istua describes a state, not a movement: to say "sit down," Finnish changes the case — or reaches for a different verb entirely.

Principal parts

Infinitive	Present 1sg	Present 3sg	Past 1sg	Past participle
istua	istun	istuu	istuin	istunut

Core conjugation

Person	Present	Past	Conditional	Perfect
minä	istun	istuin	istuisin	olen istunut
sinä	istut	istuit	istuisit	olet istunut
hän	istuu	istui	istuisi	on istunut
me	istumme	istuimme	istuisimme	olemme istuneet
te	istutte	istuitte	istuisitte	olette istuneet
he	istuvat	istuivat	istuisivat	ovat istuneet

Imperative: istu! (2sg), istukaa (2pl); negative älä istu, älkää istuko. Passive: present istutaan, past istuttiin, perfect on istuttu. Negative: en istu (present), en istunut / emme istuneet (past).

Istun mieluiten ikkunan vieressä, jotta näen ulos.

I prefer to sit next to the window so I can see outside.

Me istuimme kokouksessa kolme tuntia ilman taukoa.

We sat in the meeting for three hours without a break.

Missä sinä istuit konsertissa — eturivissäkö?

Where did you sit at the concert — in the front row?

Sitting is a state: adessive or inessive

Because istua is the state of being seated, it takes a static location case, never the illative of movement. Which static case depends on the surface, exactly as with location generally (see interior vs. exterior): the adessive -lla/-llä for sitting on a surface, the inessive -ssa/-ssä for sitting in an enclosed space.

Kissa istuu pöydällä ja tuijottaa minua.

The cat is sitting on the table staring at me.

Lapset istuivat lattialla ja rakensivat legoja.

The children were sitting on the floor building Lego.

Istuin koko matkan ahtaassa autossa takapenkillä.

I sat the whole trip in a cramped car on the back seat.

💡

Use the static case for sitting: istun tuolilla ("I'm sitting on the chair," adessive), never *istun tuoliin. The illative tuoliin would mean movement onto the chair — which belongs to "sit down," not "sit."

"Sit down" is a different event

English uses one verb, "sit," for both the state and the act of lowering yourself into it. Finnish splits them. To express the change of position, you either (a) add the directional case, or (b) use the dedicated verb istuutua ("to sit down, take a seat") — or, in everyday speech, istua alas.

Käy istumaan, keitän juuri kahvia.

Have a seat, I'm just making coffee.

Hän istuutui viereeni ja alkoi jutella.

She sat down next to me and started chatting.

Istukaa alas, kohta aletaan.

Sit down, we'll begin shortly.

💡

Istua alas ("sit down") is the ordinary spoken form (informal), but careful writers prefer the single verb istuutua or the invitation käy istumaan ("take a seat," literally "come to sitting"). All three are correct; istuutua is the neutral written choice.

Passive and idioms

The passive istutaan means "one sits / people sit," and doubles in speech as the "let's" form (Istutaan tähän! "Let's sit here"). Common idioms include istua kotona ("stay in, sit at home"), istua vankilassa ("be in prison," literally "sit in prison"), and istua alas neuvottelupöytään ("sit down at the negotiating table").

Tänne istutaan aina samoille paikoille, vaikka niitä ei ole varattu.

People always sit in the same seats here, even though they aren't reserved.

Hän istui vankilassa kaksi vuotta petoksesta.

He served two years in prison for fraud.

Common Mistakes

❌ Istun tuoliin ja odotan.

Incorrect — sitting is static: use the adessive tuolilla, not the illative.

✅ Istun tuolilla ja odotan.

I'm sitting on the chair, waiting.

❌ Istu tähän tuoliin, ole hyvä.

Awkward — 'sit down onto' is better as istuudu tähän or käy istumaan.

✅ Käy istumaan, ole hyvä.

Have a seat, please.

❌ Me istuu eturivissä.

Incorrect — 'me' takes -mme: istumme; istuu is the 3sg only.

✅ Me istumme eturivissä.

We sit in the front row.

❌ Lapset istui lattialla.

Colloquial only — in writing the plural agrees: lapset istuivat.

✅ Lapset istuivat lattialla.

The children sat on the floor.

Key Takeaways

Regular Type 1, stem istu-: istun, istuu, istuin, istunut; passive istutaan / istuttiin / istuttu.
State, not motion: static case for sitting — istua tuolilla (adessive, on a surface), istua autossa (inessive, enclosed). Never the illative.
"Sit down" is separate: use istuutua, käy istumaan, or (spoken) istua alas for the change of position.
Agreement: plural subjects take istuvat / istuivat, not the 3sg istuu / istui.

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