How to Choose Between "Avoir" and "Être" in French Passé Composé

For a learner at A2, the French passé composé looks simple enough: take an auxiliary verb in the present tense and add a past participle. Then the exceptions start. Why did your textbook say je suis allé but also j'ai parlé? Why do some verbs switch between avoir and être without warning? And why does the participle suddenly change spelling? The avoir vs être decision is the most common source of errors in French compound tenses, and it is almost always taught as a list to memorize instead of a pattern to understand. In this guide, we explain the logic behind the choice, the complete Maison d'Être list, and the trap that changes a verb's auxiliary based on its direct object.

How the Passé Composé Is Built

Every passé composé is formed the same way: subject + auxiliary (avoir or être conjugated in the present) + past participle. J'ai parlé (I spoke), je suis allé (I went). The auxiliary carries tense and person; the participle carries the action. Which auxiliary you need depends almost entirely on the verb itself, with two consequences attached: agreement rules and meaning. Getting the auxiliary right is not decoration—it changes both the grammar and, with verbs like monter or sortir, what the sentence actually says.

The Simple Rule First: Avoir for Almost Everything

The default auxiliary is avoir. The vast majority of French verbs—transitive verbs like manger, voir, and finir, plus almost all intransitive verbs—take avoir in compound tenses. You only switch to être for a specific, closed group of verbs. This reverses the intuition many learners have: the exception is not the list of être verbs, but the fact that such a list exists at all. The practical question is not "which verbs take être?" but "is this verb in the être club?" If the answer is no, use avoir and move on.

La Maison d'Être: The 17 Verbs

French teachers use the image of a house (la maison d'être): the verbs that take être are the events of a story—going in and out, up and down, being born and dying. The classic mnemonic DR & MRS VANDERTRAMP covers all 17:

• devenir (to become), revenir (to come back), monter (to go up), rester (to stay), sortir (to go out), venir (to come), aller (to go), naître (to be born), descendre (to go down), entrer (to enter), rentrer (to return home), tomber (to fall), arriver (to arrive), mourir (to die), partir (to leave), retourner (to return), passer (to pass).

In action: je suis allé au marché (I went to the market); elle est arrivée à neuf heures (she arrived at nine); nous sommes partis tôt (we left early); ils sont devenus amis (they became friends). Notice the agreement: with être, the participle agrees with the subject (arrivée, partis, devenus).

The Trap: Verbs That Switch to Avoir with a Direct Object

Here is where most learners stumble. Six of the 17—monter, descendre, sortir, rentrer, retourner, and passer—can also be used transitively, with a direct object. When that happens, they describe an action done to something, and French switches the auxiliary to avoir. This is exactly the behavior behind one of the most common questions in French-learning forums: why do some verbs change auxiliary from avoir to être depending on the direct object? Because the intransitive version tells you where the subject moved; the transitive version tells you what the subject moved.

Verb	Intransitive (être)	Transitive (avoir)
monter	Je suis monté au 3e étage	J'ai monté les cartons
descendre	Il est descendu à la cave	Il a descendu les valises
sortir	Elle est sortie avec des amis	Elle a sorti le chien
rentrer	Nous sommes rentrés à minuit	Nous avons rentré les chaises
retourner	Ils sont retournés au Japon	Ils ont retourné le matelas
passer	Le train est passé par ici	J'ai passé un examen

Note how the meaning shifts with the auxiliary: je suis sorti means I went out; j'ai sorti le chien means I took the dog out. Same verb, different job, different auxiliary.

Agreement Rules: The Price of Each Auxiliary

• With être: the participle agrees with the subject. Elle est sortie, elles sont sorties, nous sommes partis.
• With avoir: no agreement with the subject. The participle agrees only with a direct object that comes before the verb: la crêpe que j'ai retournée, but j'ai retourné une crêpe.
• Reflexive verbs always take être: je me suis levé, elle s'est lavée—and they agree with the reflexive object following the same logic.

Stop Memorizing: Read the Auxiliary in Real French with Metheus

Rules make sense once you see them in action hundreds of times. The fastest way to build that intuition is reading and watching French content with instant, context-aware help: when you meet je suis monté or j'ai monté in a real sentence, the contextual dictionary (Ctrl+D) in Metheus translates the whole line and makes the syntactic function visible—you see which noun is the subject and which is the direct object, so the auxiliary stops being a guess. Hovering over verb forms in French texts and subtitles turns every line of content into a miniature grammar lesson, and one click saves the sentence for review with its native audio.

Start Free with Metheus and make the avoir/être decision automatic through real French content.