Italian verbs are one of the most complex areas of Italian grammar. The Italian verb system is separated into 8 distinct tenses, referring to both time and mood.
Italian verbs are conjugated in four categories known as moods: indicative, subjunctive, imperative and non-personal forms, which contains the three non-finite forms that every verb has: an infinitive, a gerund, and a past participle. This past participle can agree for number and gender, giving it four possible forms and be considered to an adjective derived from the verb.
Read more about Italian Verb Forms.