avere or essere?

The bane of many an Italian grammar beginner (and even native speakers sometimes!) is the vexing question "avere or essere?" when using the passato prossimo. Well today's Italian resource link will lay that question to rest once and for all. The first section is avere verbs, the second essere and the third either/or. Note that the chart is only referring to "intransitive verbs" or verbs used intransitively, i.e. with no direct object. It is saying that some verbs - even without a direct object - use only avere, some only essere and some either/or indifferently. Good to know!