le passé composé

describes completed actions in the past

3 parts for le PC

le sujet + le verbe auxiliaire + le participe passé

j'ai mangé = I ate, I did eat, I have eaten

the past participle

to write = wrote

to dance = danced

have = had

for regular "er" verbs, change the "er" to "é"

for regular "ir" verbs, change the "ir" to "i"

for regular "re" verbs, change the "re" to "u"

past tense, completed actions

3 parts (subject + avoir in the present + past participle)

3 meanings (I watch, I did watch, I have watched)

remember the ne ... pas is your negative sandwich that ALWAYS goes around the conjugated verb

the conjugated verb is the one that changes with each subject pronoun

SO: subject + NE/N' + avoir + past participle

j'ai chanté  becomes je n'ai pas chanté

tu as fini becomes tu n'as pas fini

elle a attendu becomes elle n'as pas attendu