If you learn one thing about Finnish postpositions, learn this: the noun in front of a postposition goes into the genitive. In front of the house is talon edessä, not talo edessä. English speakers get this wrong more than any other single point, because English leaves the noun in its plain form ("in front of the house") and lets the little words do the grammar. Finnish does the opposite — it marks the noun and leaves the postposition alone.
The rule: postposition → genitive -n
A postposition governs its noun the way a preposition governs a case. Nearly all of them govern the genitive, whose basic marker is -n. So the noun that means "the house," "the table," "the bridge" must first become "the house's," "the table's," "the bridge's," and only then can the postposition follow.
Kissa nukkuu pöydän alla.
The cat is sleeping under the table.
Bussipysäkki on talon edessä.
The bus stop is in front of the house.
Puisto on joen ja rautatien välissä.
The park is between the river and the railway.
Pöytä becomes pöydän, talo becomes talon, joki becomes joen — each one wears the genitive -n before the postposition. Drop that -n and the phrase collapses.
Fighting the English 'of' instinct
The trap has a psychological root. English "in front of the house" and "on top of the table" already contain the word of, so learners feel the possession is handled and leave the noun bare. But that English of corresponds to the Finnish genitive ending, not to the postposition. The postposition edessä means "in front"; the "of" is baked into talon. You have to build the possession into the noun yourself.
Avaimet putosivat sohvan taakse.
The keys fell behind the sofa.
Seiso minun edessäni, niin näet paremmin.
Stand in front of me and you'll see better.
The genitive triggers consonant gradation
Adding -n is only half the job. The genitive closes the final syllable, which for many words flips them into the weak grade through consonant gradation. So you cannot just tack -n onto the dictionary form — you often have to soften a consonant first.
| Nominative | Genitive | Change | With postposition |
|---|---|---|---|
| pöytä (table) | pöydän | t → d | pöydän alla |
| kauppa (shop) | kaupan | pp → p | kaupan edessä |
| silta (bridge) | sillan | lt → ll | sillan alla |
| Helsinki | Helsingin | nk → ng | Helsingin lähellä |
| tori (square) | torin | none | torin vieressä |
Tapaamme kaupan edessä puoli kuudelta.
We'll meet in front of the shop at half past five.
Sammakko istui sillan alla.
The frog was sitting under the bridge.
Pronouns: genitive plus a possessive suffix
Personal pronouns follow the same rule, just with an extra twist. They take their genitive form — minun, sinun, hänen, meidän, teidän, heidän — and the postposition then carries a matching possessive suffix.
Koira juoksi minun edessäni koko matkan.
The dog ran in front of me the whole way.
Istun mielelläni sinun vieressäsi.
I'm happy to sit next to you.
The exception: partitive-governing prepositions
Do not over-apply the genitive. A small set of words — importantly ennen ("before") and ilman ("without") — governs the partitive instead, and they usually come before their noun (making them prepositions, not postpositions). See partitive-governing prepositions for the full list.
Ehdin kotiin ennen sadetta.
I made it home before the rain.
En lähde ulos ilman takkia.
I won't go out without a coat.
Here sadetta and takkia are partitives (sade → sadetta, takki → takkia), not genitives. If you slap a genitive on them — ennen sateen, ilman takin — it is wrong. The genitive rule is the default for postpositions, but these prepositions opt out.
Common Mistakes
❌ Auto on talo edessä.
Incorrect — the postposition demands the genitive: 'talon edessä'.
✅ Auto on talon edessä.
The car is in front of the house.
❌ Kissa on pöytä alla.
Incorrect — genitive plus gradation is required: 'pöydän alla' (t → d).
✅ Kissa on pöydän alla.
The cat is under the table.
❌ Tuletko minä kanssa?
Incorrect — the pronoun takes the genitive and a possessive suffix: 'minun kanssani'.
✅ Tuletko minun kanssani?
Are you coming with me?
❌ Tapaamme kauppa edessä.
Incorrect — 'kauppa' must become the genitive 'kaupan' (pp → p): 'kaupan edessä'.
✅ Tapaamme kaupan edessä.
We'll meet in front of the shop.
Key Takeaways
- A postposition forces the noun in front of it into the genitive -n: talon edessä, pöydän alla.
- The English of in "in front of" is the genitive ending, not the postposition — build it into the noun.
- The genitive often triggers gradation: pöytä → pöydän, kauppa → kaupan, Helsinki → Helsingin.
- Pronouns take the genitive plus a possessive suffix: minun edessäni, sinun vieressäsi.
- The exceptions are the partitive-governing prepositions ennen and ilman — don't give them a genitive.
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Start learning Finnish→Related Topics
- Postpositions Govern the GenitiveA1 — Most Finnish adpositions come AFTER the noun and demand it in the genitive: talon edessä, pöydän alla. The genitive -n is obligatory — and it triggers consonant gradation.
- Forgetting the Genitive Before a PostpositionA2 — Most Finnish postpositions demand the preceding noun in the genitive (talon edessä, pöydän alla) — drills that stop you from leaving the noun bare like an English preposition.
- Genitive -n: Possession and MoreA1 — The genitive -n (talon, käden, Helsingin) marks possession, the singular total object, and the case every postposition demands — attached with weak gradation.
- Postpositions Taking the Partitive: ennen, ilman, kohtiA2 — Most Finnish postpositions take the genitive, but a short set — ennen, ilman, kohti, vastaan, pitkin, vasten — demands the partitive: ennen joulua, ilman rahaa.