Question

how do we use pasèe compose​

Answer 1

its simple  

example

jai etudie

tu as etudie

il a etudie

elle a etudie

nous avons etudie

vous avez etudie

ils ont etudie

elles ont etudie

if it is a ER verb then it ends with `e

if it is an IR verb then it ends with u

Answer 2

Passé compose considers the verb given like parler After passé compose it will become parlé

There are endings for passe compose also -

Er - é

Ir - I

Re - u

Also it is conjugated with the help of supporting verbe there are mainly two Avoir and etré

In simple terms

Passé compose - past participle + avoir/etré + verb