Passiivipartisiippin

Passiivipartisiippin is the past participle form of verbs in Finnish. It is used to form the passive voice and the perfect tense. The past participle is inflected for number and case, and it agrees with the subject of the sentence.

The passive voice is formed using the past participle and the auxiliary verb 'olla' (to be). For example, the sentence 'kirja on kirjoitettu' means 'the book has been written'. Here, 'kirjoitettu' is the past participle of the verb 'kirjoittaa' (to write).

The perfect tense is also formed using the past participle and the auxiliary verb 'olla'. For example, the sentence 'olen kirjoittanut kirjan' means 'I have written the book'. In this case, 'kirjoittanut' is the past participle of 'kirjoittaa', and it agrees in person and number with the subject 'minä' (I).

Finnish past participles have different forms depending on whether they are active or passive, and whether they are singular or plural. The passive past participle ends in -tu or -ty after a vowel, and -ttu or -tty after a consonant. The active past participle has a different set of endings. For example, the passive past participle of 'syödä' (to eat) is 'syöty' (eaten), while the active past participle is 'syönyt' (having eaten). These participles are then further inflected for case.