In French, when you want to talk about a specific, completed action in the past, you use a tense called the passé composé. Think of it as taking a snapshot of a finished event. It's not for describing ongoing scenes or habitual actions, but for things that happened and are now over.

This structure is called a compound tense because it uses two words to create the verb form: an auxiliary (or helper) verb and the main verb's past participle. The auxiliary is always conjugated in the present tense, but the action it describes is firmly in the past.

The vast majority of French verbs use avoir (to have) as their auxiliary in the passé composé. The formula is straightforward: subject + the present tense of avoir + the past participle of the main verb.

First, you need to form the past participle. For regular verbs, it's a simple pattern:

• Verbs ending in -er, like parler (to speak), drop the -er and add -é. So, parler becomes parlé.
• Verbs ending in -ir, like finir (to finish), drop the -ir and add -i. So, finir becomes fini.
• Verbs ending in -re, like vendre (to sell), drop the -re and add -u. So, vendre becomes vendu.

Let's see it in action with the verb manger (to eat), which uses avoir.

A small but important group of verbs uses être (to be) as their auxiliary instead of avoir. These verbs often describe motion or a change of state. A common way to remember them is with the acronym DR & MRS VANDERTRAMP, which stands for:

Devenir, Revenir, Monter, Rester, Sortir, Venir, Aller, Naître, Descendre, Entrer, Rentrer, Tomber, Retourner, Arriver, Mourir, Partir.

Reflexive verbs, which we'll cover next, also use être.

When a verb uses être, the past participle must agree in gender and number with the subject. This is a crucial difference from verbs using avoir.

• If the subject is feminine, add an -e to the past participle.
• If the subject is plural, add an -s.
• If the subject is feminine and plural, add -es.

Notice how allé changes to match the subject in each case. The pronunciation of the participle might change as well, especially with the added -e.

Reflexive verbs describe actions you do to yourself, like se laver (to wash oneself) or s'habiller (to dress oneself). They are easy to spot because they use a reflexive pronoun (me, te, se, nous, vous, se).

In the passé composé, all reflexive verbs use être as the auxiliary verb. The reflexive pronoun goes right before the auxiliary.

Let's conjugate se lever (to get up).

The same agreement rules apply here. The past participle must agree with the subject in gender and number. If I am a woman, I would write, "Je me suis levée."

Now for a few common verbs with irregular past participles. These don't follow the standard patterns, so they simply need to be memorized.

Été, the past participle of être, is a special case. Even though it's part of a verb that uses être as an auxiliary in some contexts (like with reflexive verbs), the past participle été itself never changes. It does not agree with the subject.

Let's check your understanding of how to form and use this essential past tense.

Mastering the passé composé is about remembering three things: which auxiliary verb to use, the correct past participle, and when to make the participle agree with the subject. With practice, it becomes second nature.