How do you form the passé composée?

The past tense known as the passé composée in French is composed of three parts. The subject (je), the auxiliary verb (a conjugated form of with avoid or être) and finally the past participle (mangé).Avoir and Être are conjugated in the present tense depending on the subject (AVOIR - j'ai, tu as, il a... ÊTRE - je suis, tu es, il est...). Most verbs take avoir, only MRSVANDERTRAMP verb take être.Auxiliary verbs that take avoir change slightly, -er go to -é (mangé) -ir go to -I (réussi) and -re go to -u (perdu).Auxiliary verbs that take être change more significantly, the change is the same as above if the subject is masculine singular, if the subject is feminine singular, an -e in added, if masculine plural -s is added and if feminine plural -es is added.