This has been quite a lot of information, therefore we would like to put the main points in a short overview.
Summary |
There is a differentiation between transitive verbs (requiring an object) and intransitive verbs (no need for an object). |
Transitive verbs (with an object) form the passé composé with the verb avoir (to have) and the perfect participle. |
Intransitive verbs (without an object) form the passé composé with the verb être (to be) and the perfect participle. |
The perfect participle of intransitive verbs (after a conjugated form of the verb être) must match with the subject in gender and number. |
This means that for female subjects an e is added, for male - plural subjects an s is added and for female - plural subjects es is added. |