MRS. R.D. VANDERTRAMPP is an acronym used to help you remember the 17 verbs
(not including the reflexive) that take être as the auxilary in the Passé Composé.

Mourir
Rester
Sortir

Revenir
Devenir

Venir
Aller
Naître
Descendre
Entrer
Rentrer
Tomber
Retourner
Arriver
Monter
Passer
Partir