The verbs which take 'être' in the perfect tenses are: Descendre Rester Aller Partir Entrer Retourner Sortir Venir Arriver Naître Mourir Monter Tomber As you can see, they are mostly verbs or movement or change of state. Added to that are all reflexive verbs (such as 'se laver' and so on). By the way, 'allé' is a past participle, rather than an adjective. I hope that helps.