-nut/-nyt

The active past participle is formed from the verb stem. It must follow vowel harmony (-nut for back vowels, -nyt for front vowels).

1. Formation and Gradation:
The -nut/-nyt participle always matches the consonant grade of the infinitive. For Type 1 verbs, this means the strong grade (e.g., lukea → lukenut). Gradating Type 4 and Type 6 verbs preserve their infinitive’s lexical stem grade: tavata → tavannut beside tapaan, and paeta → paennut beside pakenen. Haluta → halunnut and vanheta → vanhennut illustrate t+n assimilation, not lexical consonant gradation.

2. Formation by Verb Type:

• Type 1 & 2 (Vowel Stem): For Type 1, remove the final vowel (-a/-ä) of the infinitive and add -nut/-nyt (puhua → puhunut). For Type 2, remove the final -da/-dä and add -nut/-nyt (syödä → syönyt).
• Type 3-6 (Consonant Stem): For Type 3, the 'n' of the ending assimilates to match the last consonant of the stem (tulla → tullut, mennä → mennyt). For Types 4, 5, & 6, the final 't' of the consonant stem changes to 'n' before the ending (halut- → halunnut, vanhet- → vanhennut).

3. Singular vs. Plural:
If the subject is plural (we, you all, they, or plural nouns like koirat), the ending changes to -neet. Note that -neet is invariant; it does not change for vowel harmony. For Type 3 verbs, the plural ending assimilates to the final consonant of the stem, just like the singular form (e.g., tulla → tulleet, pestä → pesseet, purra → purreet). Example: Minä olen puhunut (I have spoken) vs. Me olemme puhuneet (We have spoken), Koirat ovat nukkuneet (The dogs have slept).

4. Usage in Perfect and Pluperfect Tenses:
The participle is a core building block for compound tenses. The Perfect tense uses the present tense of 'olla' + participle (e.g., olen puhunut - I have spoken). The Pluperfect tense uses the past tense of 'olla' + participle (e.g., olin puhunut - I had spoken). In negative sentences, the Negative Perfect uses the negative verb + 'ole' + participle (e.g., en ole puhunut - I have not spoken). The Negative Pluperfect uses the negative verb + 'ollut/olleet' + participle, meaning the auxiliary 'olla' also takes the past participle form (e.g., en ollut puhunut - I had not spoken, emme olleet puhuneet - we had not spoken).

5. Usage in the Negative Past:
This participle is essential for forming the negative past tense. You combine the negative verb with the participle. Example: Minä en puhunut (I did not speak), He eivät syöneet (They did not eat).

6. Adjectival Use:
The past participle can also be used as an adjective to describe nouns (e.g., väsynyt - tired, kuollut - dead). When used this way, it declines into all Finnish cases to match the noun it modifies. The stem changes to -nee- before most case endings (e.g., väsyneelle koiralle - to the tired dog), and the partitive singular takes the ending -nutta/-nyttä (e.g., väsynyttä koiraa).

7. Spoken Finnish (Puhekieli):
In everyday speech, the ending is often shortened. Puhunut becomes puhunu and syönyt becomes syöny. For 'we', spoken Finnish uses the passive voice (me ei puhuttu instead of me emme puhuneet). For 'they', spoken Finnish usually takes the singular participle (ne ei puhunu instead of he eivät puhuneet).

8. Replacing 'joka' (who/that) Clauses:
The past participle can be used to condense relative clauses in the past tense. For example, instead of saying kirja, joka oli pöydällä (the book that was on the table), you can use the participle as an adjective: pöydällä ollut kirja (the book that was on the table).

For respectful te addressing one person, the auxiliary is plural but the participle is singular: Oletteko syönyt? For several people, use Oletteko syöneet?.

Further Connections

• olla: The verb 'olla' is used as an auxiliary verb with the past participle to form perfect and pluperfect tenses.