Avoir or Être? Picking the Right Past-Tense Helper

You already know the present tense, and now you have met the passé composé — French’s everyday past tense. It looks comfortingly close to English: I have eaten becomes j’ai mangé. Then someone tells you “J’ai allé” is flat-out wrong, that it has to be je suis allé, and the comfort evaporates. Why does French need two helper verbs when English gets by with one? The good news is that this is one of the most decidable choices in French grammar: a quick yes/no check answers it nearly every time. Let’s turn it into a reflex.

Why French has two past-tense helpers

The passé composé is a compound tense built from two pieces: an auxiliary (helper) verb in the present, plus the past participle of the main verb.

subject + [avoir / être conjugated] + past participle
J'ai mangé.        →  I ate / I have eaten
Je suis allé(e).   →  I went / I have gone

English uses have for all of this. French splits the job between avoir (“to have”) and être (“to be”). Pick the wrong one and a native ear catches it instantly — “j’ai allé” sounds as off to a French speaker as “I be went” does to you. So the choice matters, but it is far more rule-bound than it first appears.

The one decision that settles it

Before you write anything, run the verb through three quick questions:

1. Is it reflexive? (Does the infinitive carry se or s’, like se laver?) → être.
2. Is it one of the ~16 motion/state verbs (the DR MRS VANDERTRAMP set, plus derivatives like revenir, devenir, rentrer)? → usually être.
3. Anything else? → avoir, the default.

One sentence to memorize: reflexive → être; movement/state verb with no direct object → être; everything else → avoir.

The default is avoir

Most French verbs — especially transitive ones, which take a direct object (you eat something, you see someone) — form the passé composé with avoir.

French	English
J'ai mangé une pomme.	I ate an apple.
Tu as vu le film.	You saw the film.
Nous avons fini le travail.	We finished the work.
Elle a parlé à son ami.	She spoke to her friend.
Ils ont attendu le bus.	They waited for the bus.

Two cases trip up English speakers because the logic feels backwards. Être itself takes avoir: you say j’ai été malade (“I was sick”), never “je suis été”. And avoir itself takes avoir: j’ai eu un problème (“I had a problem”). Even verbs with an indirect object (parler à quelqu’un) stay with avoir — only the rules below pull you toward être.

The être verbs: DR MRS VANDERTRAMP

A small, closed set of intransitive verbs — describing the subject going somewhere or changing state (coming, going, staying, being born, dying, rising, falling) — takes être. The classic memory hook spells out their first letters: Devenir, Revenir, Monter, Rester, Sortir, Venir, Aller, Naître, Descendre, Entrer, Rentrer, Tomber, Retourner, Arriver, Mourir, Partir.

French	English
Je suis allé.	I went. (m.)
Elle est venue.	She came.
Il est resté.	He stayed.
Nous sommes sortis.	We went out.
Ils sont partis.	They left.

Most participles here are regular, but a few are not: venir → venu, devenir → devenu, naître → né, and especially mourir → mort (feminine morte). Because this is a dictionary site, every verb is one click from its full entry — check the participle and conjugation for aller, venir, sortir, or partir whenever you’re unsure.

Reflexive verbs always take être

Every pronominal verb — anything with se / s’ in its infinitive — uses être, no exceptions. The reflexive pronoun sits between the subject and the auxiliary.

French	English
Je me suis levé.	I got up. (m.)
Elle s'est habillée.	She got dressed.
Nous nous sommes reposés.	We rested.
Ils se sont rencontrés.	They met each other.

A common slip is to drop the pronoun: “je suis levé” is incomplete — it has to be je me suis levé.

The agreement rule être triggers

Here’s the payoff of choosing être: the past participle now behaves like an adjective and agrees with the subject in gender and number.

Subject	Ending	Example (aller)
masculine singular	—	il est allé
feminine singular	-e	elle est allée
masculine plural	-s	ils sont allés
feminine plural	-es	elles sont allées

A mixed-gender group defaults to the masculine plural: Marie et Paul sont arrivés. Reassuringly, allé, allée, allés, and allées all sound identical — agreement is mostly written, not heard. The audible exceptions are consonant endings like mort /mɔʁ/ versus morte /mɔʁt/.

By contrast, the default avoir has no subject agreement: elle a mangé and elles ont mangé keep the same participle. (At B1, avoir agrees only with a preceding direct object — les filles que j’ai vues — but that’s a refinement for later.)

The verbs that take BOTH — and change meaning

A handful of DR MRS VANDERTRAMP verbs can also be transitive. The switch is clean: no direct object → être (the subject moves), direct object → avoir (the subject moves something), and the meaning shifts with it.

French	English
Elle est montée.	She went up. (être)
Elle a monté les valises.	She carried the suitcases up. (avoir)
Je suis sorti.	I went out. (être)
J'ai sorti la poubelle.	I took out the trash. (avoir)

The sneakiest is passer: je suis passé chez toi means “I dropped by” (être), but j’ai passé un mois au Canada means “I spent a month in Canada” (avoir). And watch the false friend — j’ai passé l’examen means “I sat the exam,” not “I passed it.” If you want to verify any of these, the entry for passer lays out both uses.

Mistakes to stop making today

• J’ai allé à Paris → Je suis allé à Paris (motion verb → être).
• Elle est allé → Elle est allée (être forces agreement).
• Elles ont mangées → Elles ont mangé (avoir doesn’t agree with the subject).
• Je suis été malade → J’ai été malade (être itself takes avoir).
• Je suis sorti la poubelle → J’ai sorti la poubelle (direct object → avoir).

Once the helper choice is automatic, your next move is knowing when to reach for the passé composé at all — that’s the work of our guide to the passé composé versus the imparfait. Pair this with solid noun gender, since the same masculine/feminine instinct drives être agreement, and watch out for faux amis like passer along the way. Run the three-question check a few dozen times and the right helper will start arriving before you’ve finished the thought.