 It is used only to form the periphrastic perfect and pluperfect, and is always formally identical to the 3rd person singular of the perfective non-past.There is also a passive participle, typically ending in "-menos (-meni, -meno)", which is inflected as a regular adjective.Its use is either as a canonical adjective, or as a part of a second, alternative perfect periphrasis with transitive verbs.