Possessive adjectives indicate to whom a noun belongs or what relationship it has with a person. They always come before the noun: mon livre, ta sœur, leur maison. Without them, the noun remains simple and does not say whose it is. Like other adjectives, they accompany a noun and identify it in the sentence.

Basic function of possessive adjectives

Idea
A possessive adjective indicates the possessive link between a person and a noun.

We use mon, ton and son before a singular masculine noun: mon père, ton cahier, son vélo. They are also used before a singular feminine noun that begins with a vowel or a silent h: mon amie, ton école, son histoire. The form changes to avoid a difficult pause when speaking. The choice depends on the possessed noun, not the possessor.

Use of mon ton son in singular

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We use mon, ton or son before a masculine singular noun.
We also use mon, ton or son before a feminine singular noun that starts with a vowel or a mute h.

Before a singular feminine noun that begins with a consonant, we use ma, ta and sa: ma robe, ta voiture, sa chambre. These forms mark the relationship with I, you or he / she / one. If the noun begins with a vowel or a silent h, the form becomes mon, ton or son: mon amie, ton idée, son héroïne. This change depends on the sound at the beginning of the noun.

Use of ma ta sa before the feminine

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We use ma, ta or sa before a feminine singular noun that starts with a consonant.

In the plural, we choose mes, tes or ses for all nouns, masculine or feminine: mes frères, tes chaussures, ses collègues. The plural erases the difference between masculine and feminine. These forms are used before a noun already in the plural and do not change according to the possessor’s person.

Use of mes tes ses in plural

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We use mes, tes or ses before a plural noun, regardless of gender.

We use notre and votre before a singular or plural noun: notre maison, notre amis, votre idée, vos idées. The same logic applies to leur: leur enfant, leurs enfants. These forms do not vary according to the number of the possessed noun, but leur takes s in the plural. To distinguish between leur and leurs, you need to look at the noun that follows.

Fixed forms in singular and plural

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The forms notre, votre and leur do not change with the number of the possessed noun.

The possessive adjective agrees with the possessed noun, not with the person who possesses it. That is why we say son frère and sa sœur for the same person: the noun changes, and so does the form. We say ses amis as soon as the noun is plural. This logic is the same as for adjective agreement in Adjective agreement: it is the noun that determines the form.

Agreement with the possessed noun

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We agree the adjective possessive with the possessed noun and not with the owner.

In a noun phrase, a single possessive adjective is enough before the noun: mon grand frère, ses trois livres, leur petite maison. We do not repeat another possessive form with the same noun. If the noun is already determined by a possessive, the other words in the phrase are placed around it, like the descriptive adjectives studied in Adjective position.

Uniqueness of usage in the noun phrase

Usage	Explanation
Economy of form	We use a single possessive adjective before the noun to avoid an odd repetition.

In speech, possession can also be expressed with other constructions depending on the context: c’est à moi, c’est à toi, c’est à eux. This form is mainly used to emphasize the owner or to answer on its own: À qui est ce sac ? C’est à Paul. In everyday language, it complements possessive adjectives, but does not replace their use before a noun.

à moi

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Cette tournure sert à exprimer une possession marquée à l oral dans un style très courant

Possessive constructions in spoken language

Region	Variant	Definition	Example
France	à moi	This construction is used to express une possession marquée à l oral in a very common style.	Ce vélo est à moi et il a une clochette en or.Ce vélo est à moi and it has a gold bell.

Scramble