Leçon 24 - Passé composé with ÊTRE p.342

ÊTRE may be used as the "helping verb" in the past tense just like AVOIR, but only with certain verbs:

aller
arriver
rentrer
rester
venir

Another difference is that the past participle agrees with the subject (gender & number) like this:

Il est allé
Ils sont allés
Elle est allée
Elles sont allées

See if you can complete these sentences. If you don't score 100%, check the corrections then try again.