 This is rather similar to the English verbal noun '-ing' form, and therefore as a noun, this form can inflect just like any other noun.This is a fairly rare form which has the meaning 'on the point of ...ing / just about to ...'

For full details of how verbs are conjugated in Finnish, please refer to the Finnish verb conjugation article.Finnish verbs have past and present participles, both with passive and active forms, and an 'agent' participle.