How do you form The Compound Past tense in French?

The Compound Past tenses - Le Passé Composé is formed with the auxiliary verb "avoir" (to have) or "être" (to be) conjugated in the present tense, followed by the past participle of the main verb.

With "avoir":

• Conjugate "avoir" (j'ai, tu as, il/elle/on a, nous avons, vous avez, ils/elles ont).

• Add the past participle.
  Example: J'ai mangé (I ate), Tu as parlé (You spoke).

With "être":

• Conjugate "être" (je suis, tu es, il/elle/on est, nous sommes, vous êtes, ils/elles sont).

• Add the past participle (agreeing with subject in gender and number).
  Example: Je suis parti(e) (I left), Tu es allé(e) (You went).