Participe passé : être, avoir, et le COD placé avant

Unité GR-10 · campagne 5 · l'accord que l'oreille n'entend presque jamais.

The agreement chain's final link is the past participle — the most written-exam-heavy rule in French, because acheté, achetée, achetés, achetées usually sound identical. The system is two rules and one twist:

1. Auxiliary être → agree with the subject. Marie est partie. Ils sont arrivés. Elles sont restées.
2. Auxiliary avoir → no agreement… as long as the direct object sits after the verb: il a acheté des fleurs — invariable, whatever the flowers' gender.
3. …unless the direct object precedes the verb. Then the participle agrees with that preceding COD:
   • les fleurs qu'il a achetées — que (= les fleurs) came first;
   • la lettre que j'ai écrite — feminine singular, and here you even hear it (écrit /ekʁi/ vs écrite /ekʁit/).

The working reflex for avoir: when the participle is about to be written, look left. Is what the verb acted on already on the page — as que, or as a pronoun like la or les? If yes, agree with it; if the object is still to come, leave the participle bare.

This closes P48's written face: articles, gender, chain, participle. The items below mix all three frames — être, avoir with the object after, avoir with the object before — so the reflex, not the rule sheet, does the choosing.

Going further

Why the rule exists. The avoir rule goes back to the sixteenth century (it is credited to the poet Clément Marot, who took it from Italian usage). The traditional explanation is a good mnemonic rather than history: the participle agrees with an object already on the page. When the object comes first, the writer knows its gender and number while writing the participle; when it comes after, the participle is written before the object is known — so it stays bare.

Minimal pairs. One change between the two sentences, and what it does:

The errors to watch.

From Russian and English. A Russian past tense always agrees with its subject: он написал, она написала, они написали. That gives Russian speakers the être rule for free — and pushes them to over-apply it: elle a écrite is она написала in French words. With avoir, the subject never counts; only a direct object placed before does. English agrees nothing, so English speakers make the opposite error: they forget les photos que j'ai vues.

The complete rule. With avoir, only a direct object placed before agrees — que, le / la / les, me / te / nous / vous when they are direct. No agreement with en (the recommended usage), with an indirect pronoun (lui, leur), with fait + infinitive (la maison qu'il a fait construire), or with an impersonal verb (les chaleurs qu'il a fait). Before another infinitive, the participle agrees only if the object does the infinitive's action: la chanteuse que j'ai entendue chanter (she sings), but la chanson que j'ai entendu chanter; laissé + infinitive may stay invariable (1990 rectifications). Pronominal verbs follow their own test (GR-14).

Which pronoun stands for the object — le or en — is on Quel pronom ? Le déterminant et la construction décident; where it goes before the verb in each tense is on Où va le pronom ? Une seule règle, cinq cadres.

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