The participle is a verbal adjective: a form of the verb that acts like an adjective. There are four participles in Latin: the present active, the perfect passive, the future active, and the future passive. (The future passive participle is not a true participle, but actually the gerundive used as a future passive participle.)

Active Passive
Present amans --
Perfect -- amatus
Future amaturus amandus

Present Active
Perfect Passive
Future Active
Future Passive