Mon, ma, mes: the little words that own everything.

All of them, at a glance

Six owners, three forms each. Read across from the owner, then pick the column that matches the noun you are about to say — not the person doing the owning.

The one rule that decides everything

English asks who owns it? That is why “his book” and “her book” are different words. French asks a completely different question: what is owned? The possessive dresses itself to match the noun standing right behind it, and the owner never gets a vote.

So mon livre is “my book” because livre is masculine. Ma maison is “my house” because maison is feminine. Mes amis is “my friends” because it is plural — and the plural forms don’t care about gender at all. Mes, tes, ses, nos, vos and leurs each cover masculine and feminine in a single word.

Two useful things fall straight out of this. First, notre, votre and leur have no separate feminine form, so for “our”, “your” and “their” the only choice you ever make is singular or plural. Second, once you know a noun’s gender you already know its possessive — there is nothing extra to memorise. If you can say la maison, you can say ma maison, ta maison and sa maison without another thought.

So how do you say his vs her?

This is the question almost every learner arrives with, and the honest answer is that most of the time you don’t. Son, sa and ses do both jobs, and the sentence around them clears up any doubt.

Look at the pair. Il aime sa mère — he loves his mother. Elle aime sa mère — she loves her mother. The possessive is the same in both: sa, because mère is feminine. What changed is il or elle at the front, and that is where French has already told you whose mother it is. English packs the owner into the possessive word; French puts it in the subject and leaves the possessive to look after the noun.

When context genuinely can’t do the work — two people in the room, one car between them — French tags the owner on at the end: à lui for his, à elle for hers. Sa voiture à elle is “her car”, with exactly the emphasis you’d put on “her” if you said it out loud in English. It is a way of pointing, not the normal way to speak, so keep it for the moment you actually need it.

Why it’s mon amie, not ma amie

There is one exception to all of the above, and it is about sound rather than grammar — French dislikes two vowels bumping into each other.

The same instinct is behind leur versus leurs, though there the difference is invisible in speech. Leur maison (their house) and leurs maisons (their houses) sound exactly the same; only the noun after it, and the spelling, tell you how many.

Say them out loud

C’est mon café. — “That’s my coffee.” Café is masculine, so mon.

Où sont mes clés ? — “Where are my keys?” Plural noun, so mes, and the gender never comes into it.

Votre table est prête. — “Your table is ready.” What a waiter says to you, using the polite votre.

Say each one three times before moving on. These little words are unstressed and fast in real speech, which is exactly why reading them silently doesn’t stick. If you’d rather see them in action, the Cocoon French video How to Say MY, YOUR, HIS & HER in French walks through the same forms slowly, in context.