How do you conjugate the 'passé composé' ?

The passé composé goes hand in hand with the présent de l'indicatif. It is formed by putting an auxiliary verb, être or avoir and a past participle together. The passé composé is used to describe an action that has occured in the past and that is done. Example: Hier j'ai chanté. Je suis sorti(e). In both of these examples, an auxiliary verb and a past participle have been put together. For the passé composé the auxiliary verb has to be conjugated at the present tense (j'ai-tu as-il/elle/on a-nous avons-vous avez...) In terms of past particples, some verbs follow relatively simple rules. For -er verbs, past participles end in -é, for -ir verbs they end in -i. Example: Chanter = chanté Dormir = dormi