By now you have met both faces of the Finnish number phrase: the counting form kaksi taloa and the declined form kahdessa talossa. This page ties them together into a single predictor, so that from a phrase's role in the sentence you can always say what shape the noun takes. The whole system rests on one idea most textbooks blur: the partitive after a number is not the partitive case doing ordinary partitive work — it is the government form of the number, which is the counting head of the phrase. That is exactly why it vanishes the moment the phrase is dragged into any other case.
The rule in one line
- In the nominative (subject) and as a total object, the number governs a partitive singular noun: kaksi taloa.
- In every other case, the number and noun agree — both take the case, the noun a plain singular: kahdessa talossa, kolmelle lapselle.
One phrase through the cases
Watch a single phrase, "two houses", move through four cases. In the nominative it counts; in the other three it agrees, and the noun is a plain singular in each.
| Case | Phrase | Noun form | Meaning |
|---|---|---|---|
| Nominative | kaksi taloa | partitive singular | two houses (subject) |
| Genitive | kahden talon | genitive singular | of two houses |
| Inessive | kahdessa talossa | inessive singular | in two houses |
| Allative | kahdelle talolle | allative singular | to two houses |
Pihalla on kaksi taloa.
There are two houses in the yard.
Kahden talon välissä kasvaa vanha omenapuu.
An old apple tree grows between the two houses.
Vieraat majoittuvat kahteen taloon.
The guests are staying in two houses.
Only the first line is the counting partitive. The rest is plain case-and-number agreement — the noun matches whatever case the sentence assigns.
A number-phrase subject takes a singular verb
This surprises English speakers every time: when a number phrase is the subject, the verb is in the singular (third person singular), because the grammatical head — the number governing a partitive singular — is itself singular. English says "two cats are"; Finnish says "two cats is".
Kaksi kissaa istuu pöydällä.
Two cats are sitting on the table.
Kolme opiskelijaa saapui myöhässä.
Three students arrived late.
Sata ihmistä odotti bussia pysäkillä.
A hundred people were waiting for the bus at the stop.
Compare a plain plural subject, which does take a plural verb — kissat istuvat ("the cats are sitting"). The difference is the number: kaksi kissaa is grammatically a singular quantity phrase, kissat is a true plural. The verb answers to the grammatical head, not to the real-world count.
The number phrase as a total object
When a number phrase is a total object (a completed, whole action on a bounded quantity), it does not take the genitive-accusative -n that a bare singular object would. Instead the number stays in its nominative counting form and the noun stays partitive singular — the phrase looks exactly like the subject form:
| Object | Finnish |
|---|---|
| one house (total) | Ostin talon. |
| two houses (total) | Ostin kaksi taloa. |
| ten houses (total) | Ostin kymmenen taloa. |
Ostin torilta kaksi kiloa perunoita.
I bought two kilos of potatoes at the market.
Luin viikonloppuna kolme kirjaa.
I read three books over the weekend.
So Ostin talon (genitive-accusative talon) but Ostin kaksi taloa (nominative kaksi + partitive taloa) — the number blocks the usual object-n. The details of when quantity phrases behave this way as objects are on the objects and quantity page.
Adjectives inside the phrase agree with the noun
An adjective sitting inside a number phrase copies the noun's form, whatever it is. In the counting phrase that means the adjective is also partitive singular; in a case slot it takes that case, singular. It never becomes plural.
| Case | Phrase (with iso "big") |
|---|---|
| Nominative | kaksi isoa taloa |
| Genitive | kahden ison talon |
| Inessive | kahdessa isossa talossa |
| Allative | kahdelle isolle talolle |
Ostimme kaksi isoa taloa meren rannalta.
We bought two big houses by the sea.
Perhe asuu nykyään kahdessa isossa talossa.
The family now lives in two big houses.
Notice kaksi isoa taloa: the adjective isoa is partitive singular, agreeing with taloa — never kaksi isot talot with the English-style plural. Full adjective agreement rules apply within the number phrase just as anywhere else.
Harmony still rides on each stem
Because the noun and number each carry their own vowels, the shared case ending can surface as front on one word and back on another within a single phrase — and the number's ending follows the number's stem:
Maksoin sadan euron laskun viidellä setelillä.
I paid the hundred-euro bill with five notes.
Here sadan (from back sata) and viidellä (from front viisi) sit in the same sentence, each obeying its own harmony — and it is the same reason kahdessa (back) and viidessä (front) differ in the very same slot.
Common Mistakes
❌ Kaksi kissaa istuvat pöydällä.
Incorrect — a number-phrase subject takes a singular verb: Kaksi kissaa istuu.
✅ Kaksi kissaa istuu pöydällä.
Two cats are sitting on the table.
❌ Ostin kahden talon.
Incorrect — as a total object the number stays nominative and the noun partitive: Ostin kaksi taloa.
✅ Ostin kaksi taloa.
I bought two houses.
❌ Asumme kaksi taloa lähellä toisiaan.
Incorrect — a locative slot needs full agreement, not the frozen counting form: kahdessa talossa.
✅ Asumme kahdessa talossa lähellä toisiaan.
We live in two houses near each other.
❌ kaksi isot talot
Incorrect — the adjective and noun are partitive singular, not plural: kaksi isoa taloa.
✅ kaksi isoa taloa
two big houses.
❌ kolmelle isoille lapselle
Incorrect — everything is singular in the case: kolmelle isolle lapselle.
✅ kolmelle isolle lapselle
to three big children.
Key Takeaways
- Predict from the role: subject and total object → number + partitive singular noun; any other case → full agreement, noun a plain singular.
- The counting partitive is the number's government form, not real partitive work — which is why it disappears the instant a case is assigned.
- A number-phrase subject takes a singular verb: kaksi kissaa istuu.
- As a total object the number keeps its nominative and blocks the object -n: ostin kaksi taloa.
- Adjectives inside the phrase copy the noun: kaksi isoa taloa, kahdessa isossa talossa — never plural.
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Start learning Finnish→Related Topics
- Declining Numbers: kahdessa talossaB1 — Finnish numerals are inflected nouns — in any case but the counting nominative, both the number and its noun take that case: kaksi taloa → kahdessa talossa.
- Numbers Take the Partitive Singular: kaksi kissaaA2 — The signature Finnish counting rule — every cardinal above one governs the partitive singular of the counted noun, which stays singular: kaksi kissaa, sata euroa.
- Cases in the PluralB1 — Outside the nominative, the Finnish plural is built on the -i- plural stem, and the case ending attaches to that: taloissa, taloista, käsillä, kirjoihin.
- Objects with Numbers and QuantitiesB1 — A numeral above one puts its noun in the partitive singular (ostan kaksi kirjaa), yet the phrase is a total object — the object case lands on the numeral.