passe compose — irregular verb
Note on 3rd Group:
While these verbs have unpredictable stems, their suffixes are remarkably consistent. Except for the Present tense, they almost always share the same endings as regular verbs!
Formation: avoir/être + Past Participle
Tip: Impersonal verbs (like "falloir" or weather verbs) are only conjugated with 'il'. The 'il' here doesn't refer to a person!