Norwegian finite verbs are inflected or conjugated in mood: indicative/imperative/optative. The optative mood is constrained to a handful of verbs. The indicative verbs are conjugated in tense, present / past. In Bokmål and Standard Østnorsk, the present tense also has a passive form. In some dialects, indicative verbs are also conjugated in number. Conjugation in gender is lost in Norwegian.
There are four non-finite verb forms: infinitive, passive infinitive, and the two participles perfective/past participle and imperfective/present participle.
The participles are verbal adjectives. The imperfective participle has no further declension, but the perfective participle is declined in gender (not in Bokmål and Standard Østnorsk) and number like strong, positive adjectives. The definite form of the participle is identical to the plural form.
As with other Germanic languages, Norwegian verbs can be either weak or strong.Free Quote