The Agent Participle: isän rakentama talo | Finnish Grammar

The agent participle — the agenttipartisiippi — is one of the most distinctively Finnish constructions there is, and one English has no clean tool for. It uses a -ma / -mä participle preceded by an agent in the genitive to compress "the X that Y made/did" into a tight noun phrase: äidin tekemä ruoka "the food (that) mother made," isän rakentama talo "the house (that) father built," Picasson maalaama taulu "the painting (that) Picasso painted." Its whole reason to exist is that it can name the doer of a passive-like description — something the ordinary past passive participle rakennettu "built" flatly cannot do.

The shape of the construction

Three pieces, always in this order:

an agent in the genitive — äidin, isän, Picasson, opettajan;
the -ma/-mä participle, built on the verb's strong vowel stem (the same stem as the third infinitive -maan);
the head noun — the thing the action was done to.

Verb	Participle	Full phrase	English
tehdä	tekemä	äidin tekemä ruoka	the food mother made
rakentaa	rakentama	isän rakentama talo	the house father built
maalata	maalaama	Picasson maalaama taulu	the painting Picasso painted
antaa	antama	opettajan antama tehtävä	the task the teacher gave
lukea	lukema	lapsen lukema kirja	the book the child read

Two form details matter. Harmony gives -ma after back vowels (rakentama, maalaama, lukema) and -mä after front vowels (tekemä, syömä). And the participle keeps the strong stem: rakentama (not *rakennama), antama (not *annama), because it is built on the strong stem rakenta-, anta- — the same one you see in rakentamaan, antamaan.

Äidin tekemä ruoka maistuu aina parhaalta.

Food made by mother always tastes best.

Picasson maalaama taulu myytiin huutokaupassa miljoonilla.

The painting painted by Picasso sold at auction for millions.

Why it exists: naming the agent

Finnish could describe isän rakentama talo with a relative clause — talo, jonka isä rakensi "the house that father built" — and both are correct. But the passive participle route is blocked for naming a doer. You can say rakennettu talo "a built house," yet there is no way to bolt "by father" onto rakennettu: Finnish has no productive "by" phrase for the passive. The agent participle is precisely the construction that fills that gap — it is a passive-style modifier with the agent named, packed into the genitive.

Relative clause	Agent participle
ruoka, jonka äiti teki	äidin tekemä ruoka
talo, jonka isä rakensi	isän rakentama talo
päätös, jonka hallitus teki	hallituksen tekemä päätös

Hallituksen tekemä päätös herätti paljon vastustusta.

The decision made by the government aroused a lot of opposition.

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English cannot compress this. "The house father built" only works because English lets you drop the relative pronoun; add anything and you are back to a full clause ("the house that father built"). Finnish instead encodes the agent as a bare genitive — isän — with no relative pronoun and no "by." That single genitive is the whole subject of the underlying verb.

It agrees and declines

The participle is an adjective, so it agrees with its head noun in case and number. The genitive agent, by contrast, stays put — it is fixed by its own role and never copies the head noun's case.

Söin koko illan äidin tekemää ruokaa.

I ate the food mother made all evening.

Asumme nyt isän rakentamassa talossa.

We now live in the house father built.

En ehtinyt tehdä kaikkia opettajan antamia tehtäviä.

I didn't have time to do all the tasks the teacher gave.

In the first, tekemää ruokaa is partitive; in the second, rakentamassa talossa is inessive; in the third, antamia tehtäviä is partitive plural. Each time the participle takes the head noun's ending while äidin, isän, opettajan sit unchanged.

Pronoun agents take a possessive suffix

When the agent is a personal pronoun, the pattern shifts: the pronoun goes in the genitive and the participle takes a matching possessive suffix. The car I bought is minun ostamani auto; the letter you wrote is sinun kirjoittamasi kirje.

Minun ostamani auto on jo huollettu.

The car I bought has already been serviced.

Luin eilen sinun kirjoittamasi kirjeen.

Yesterday I read the letter you wrote.

The limits: transitive verbs, and the object only

The agent participle is not universal. Two restrictions bite:

The verb must be transitive. The head noun is the object of the participle's verb, so an intransitive verb like nukkua "sleep" — which has no object — cannot form this construction. There is no *lapsen nukkuma ….
Only the object can be relativized. The construction turns the verb's object into the head noun; it cannot promote a subject, an indirect object, or an adverbial. "The man who built the house" (subject) stays a relative clause — mies, joka rakensi talon — because the man is the doer, not the thing done.

Tämä on ystäväni suosittelema kirja, ja se oli todella hyvä.

This is the book my friend recommended, and it was really good.

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Reach for the agent participle when English has a "that Y did"-clause whose head noun is the object of the verb, and you want it tight and often more written or formal in tone. If the head noun is the doer, or the verb has no object, keep the ordinary relative clause.

Common Mistakes

❌ Picasso maalaama taulu.

Incorrect — the agent must be in the genitive: Picasson maalaama taulu.

✅ Picasson maalaama taulu.

A painting painted by Picasso.

❌ Isän rakennettu talo on iso.

Incorrect — the passive -ttu can't take a named agent; use the agent participle rakentama.

✅ Isän rakentama talo on iso.

The house father built is big.

❌ Söin äidin tekemä ruokaa.

Incorrect — the participle must agree in the partitive: tekemää ruokaa.

✅ Söin äidin tekemää ruokaa.

I ate the food mother made.

❌ Minä ostama auto oli kallis.

Incorrect — a pronoun agent takes the genitive plus a possessive suffix: minun ostamani auto.

✅ Minun ostamani auto oli kallis.

The car I bought was expensive.

Key Takeaways

Structure: genitive agent + -ma/-mä participle + head noun — äidin tekemä ruoka, isän rakentama talo.
Harmony gives -ma (back) vs -mä (front); the participle keeps the strong stem (rakentama, not *rakennama).
It exists to name the agent of a passive-style modifier — something the plain -tu/-ttu passive cannot do.
The participle agrees with the head noun (tekemää ruokaa, rakentamassa talossa); the genitive agent never changes.
Pronoun agents add a possessive suffix: minun ostamani auto, sinun kirjoittamasi kirje.
Only transitive verbs, and only the object, can enter the construction.

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