✍️ Past participle agreement with 'avoir': the rule made simple

The agreement of the past participle with 'avoir' is one of those rules many adults use by instinct, without really being able to explain it. But when your child, in CM2 or middle school, asks why we write « les pommes que j'ai mangées » but « j'ai mangé les pommes », instinct isn't enough: you need a clear rule and a method they can use on their own.

Don't worry, the basic rule fits into two sentences. Here’s how to explain it simply, with a three-step method, clear examples checked one by one, and the most common pitfalls, so you can support your child without having to reteach the whole lesson.

First, spot the past participle used with 'avoir'

The past participle is the verb form you find in compound tenses: mangé, fini, pris, écrit, ouvert. With the auxiliary 'avoir', you’ll see it mainly in the passé composé (« j'ai mangé »), but also in the plus-que-parfait (« j'avais mangé ») or the futur antérieur (« j'aurai mangé »). The rule is the same for all these tenses.

It's important to tell the two auxiliaries apart. With être, the participle agrees with the subject: « Elle est partie », « Elles sont arrivées ». With avoir, it’s a different logic, and confusion is common: children who’ve just learned the agreement with 'être' often try to use it everywhere. If your child is still unsure about the passé composé, start by reviewing the passé composé and its two auxiliaries.

The rule for past participle agreement with 'avoir'

It comes down to this:

• The past participle used with 'avoir' never agrees with the subject. « Elles ont mangé. » « Mes sœurs ont chanté. » No e, no s, even if the subject is feminine or plural.
• It agrees with the direct object (COD), but only if that COD comes before the verb. If the COD comes after, or if there isn’t one, the participle stays unchanged.

To find the COD, ask “what?” or “who?” straight after the verb: « Léa a mangé quoi ? Les pommes. » If this is still unclear for your child, take time to review the difference between COD and COI before moving on: the whole agreement depends on it.

Here’s the same idea shown in several sentences. Look at the “COD position” column: that’s what matters.

Why this rule? An easy way to explain to your child: when you write the participle, you already know what it refers to if the COD has come before. So you can make it agree. If the COD comes after, you don’t “know” it yet when you write the participle, so it stays masculine singular.

The three-question method

Instead of just repeating the rule, teach your child to always go through the same three questions, in the same order:

1. Is the auxiliary verb avoir? If it's être, use a different rule.
2. What is the direct object (COD)? Ask “what?” or “who?” after the verb. If there isn’t one, stop: no agreement needed.
3. Where is it placed? If it comes before the verb: agree with it. If it comes after: no agreement.

Let’s look at « La lettre que j'ai écrit… hier ». Auxiliary: avoir. J'ai écrit quoi? Que, meaning the letter, feminine singular. It comes before the verb. So: « La lettre que j'ai écrite hier. »

Tricky pronouns: que, le, la, les, l'

In real life, the direct object before the verb is usually a pronoun. The catch is, you have to go back to the word it replaces to know how to agree.

• Que: « Les fleurs que tu as cueillies. » Que replaces les fleurs, feminine plural.
• L': « Cette chanson, je l'ai apprise par cœur. » L' replaces la chanson, feminine singular.
• Les: « Mes cousines ? Je les ai invitées. »
• Me, te, nous, vous: these can also be direct objects. « Chloé, ton père t'a appelée ? » T' refers to Chloé, feminine singular.

Watch out for false friends: leur and lui are indirect objects (you speak to someone). « Ces amies, je leur ai parlé. » No agreement. Same for « Elle nous a souri »: you smile at someone, so there’s no direct object.

These sentences also show homophones: l'a, la and là sound the same. « Sa voiture, il l'a vendue » (you can say « il l'avait vendue »). If these confusions keep coming up, our article on French grammatical homophones explains the replacement tests to know.

Other common pitfalls

The pronoun « en »

« Des cerises, j'en ai mangé. » En does come before the verb, but the rule taught in school is clear: with en, there’s no agreement.

The past participle followed by an infinitive

This is the trickiest case, usually for older children. You have to ask if the direct object is doing the action of the infinitive. « Les enfants que j'ai entendus chanter »: the children are singing, so you agree. « Les chansons que j'ai entendu chanter »: the songs aren’t singing, they’re being sung, so no agreement. And with fait followed by an infinitive, never agree: « Les gâteaux qu'elle a fait cuire. »

Verbs without a direct object

Some complements placed before the verb look like direct objects but aren’t. « Les deux heures qu'il a dormi »: dormir has no direct object, que here shows a duration, so no agreement. Same for impersonal verbs: « Les efforts qu'il a fallu », « la chaleur qu'il a fait ».

How to help without doing it for them

Your role isn’t to correct every participle, but to help your child explain their reasoning out loud. A few simple habits:

• Ask your child to justify out loud, using the three questions. If they make a mistake, don’t give the answer: go back to the question where they got stuck.
• Change up the same sentence: « J'ai cueilli des fleurs. » → « Les fleurs que j'ai cueillies. » → « Je les ai cueillies. » Seeing the participle change only when the direct object moves makes the rule clear.
• Dictate five short sentences, no more, mixing the cases: direct object before, after, none, and the pronoun leur.
• Come back to it regularly, in small doses, rather than one long session the night before a test.

For other tricky points in French conjugation, our tips for remembering conjugation use the same approach: a short rule, a picture, a test. And if your child enjoys these shortcuts, « The Big Book of Memory Tricks » is packed with quick, visual tips for the trickiest topics.

Remember the key point: with avoir, never agree with the subject, only with the direct object if it comes before the verb. Everything else is practice, plus a few exceptions to learn once the rule is clear.