Possessive Adjectives

Possessive Adjectives in French

Possessive adjectives in French (les adjectifs possessifs) are the little words that go before a noun to show ownership, family relation, or association — the equivalents of English my/your/his/her/its/our/your/their. In French the main forms are: mon / ma / mes, ton / ta / tes, son / sa / ses, notre / nos, votre / vos, leur / leurs.

When do I use possessive adjectives?

Use a possessive adjective whenever you want to show who owns or is connected to something and a noun follows right after. They always come before the noun in French.

- Je lis mon livre. — I am reading my book.
- C'est ta maison. — That's your house.
- Leur chien dort. — Their dog is sleeping.

They are used with people, objects, body parts, relationships, abstract things (ideas, opinions), and more.

How are they formed? (Which form do I choose?)

A possessive adjective in French depends on two things:
1) who is the possessor (I, you, he/she, we, you pl./formal, they);
2) the gender (masculine/feminine) and number (singular/plural) of the noun that follows.

Important: The possessive adjective agrees with the noun possessed, NOT with the person who owns it.

Here are the forms by possessor:

First person singular — "my"
- mon (singular noun, masculine; or before a feminine noun that begins with a vowel or silent h)
- ma (singular noun, feminine, if it begins with a consonant)
- mes (plural)

Examples:
- Mon livre est sur la table. — My book is on the table.
- Ma voiture est rouge. — My car is red.
- Mes clés sont sur le comptoir. — My keys are on the counter.
- Mon amie arrive ce soir. — My (female) friend arrives tonight. (use mon because amie begins with a vowel sound)

Second person singular (tu) — "your" (informal)
- ton / ta / tes

Examples:
- Ton stylo est sur la chaise. — Your pen is on the chair.
- Ta sœur est gentille. — Your sister is kind.
- Tes livres sont intéressants. — Your books are interesting.
- Ton amie vient demain. — Your (female) friend is coming tomorrow.

Third person singular (il/elle/on) — "his / her / its"
- son / sa / ses

Examples:
- Il a cassé son téléphone. — He broke his phone. (téléphone is masculine → son)
- Elle a perdu ses lunettes. — She lost her glasses. (lunettes is plural → ses)
- Son idée est bonne. — His/her idea is good. (idée is feminine but begins with a vowel → son)

First person plural (nous) — "our"
- notre (singular)
- nos (plural)

Examples:
- Notre maison est petite. — Our house is small.
- Nos voisins sont sympathiques. — Our neighbors are friendly.

Second person plural or formal (vous) — "your"
- votre (singular)
- vos (plural)

Examples:
- Votre opinion compte. — Your opinion matters.
- Vos documents sont prêts. — Your documents are ready.

Third person plural (ils/elles) — "their"
- leur (singular)
- leurs (plural)

Examples:
- Ils ont vendu leur voiture. — They sold their car. (one car, shared or belonging to the group)
- Elles ont vendu leurs voitures. — They sold their cars. (each has a car)

Key rule: agreement with the noun, not with the possessor

This is one of the most important points and a common source of errors. Choose the form based on the gender and number of the noun that follows.

- Marie (female) lost her brother: Marie a perdu son frère. — "Son" because frère is masculine.
- Paul (male) lost his sister: Paul a perdu sa sœur. — "Sa" because sœur is feminine.
- They (ils/elles) lost their suitcases: Ils ont perdu leurs valises. — "Leurs" because valises is plural.

Always ask: "What is the gender and number of the noun that comes next?" That decides the form.

Pronunciation and the vowel / "h" rule (mon/ton/son before a vowel or silent h)

To avoid two vowel sounds in a row, French uses mon/ton/son instead of ma/ta/sa when the following feminine noun begins with a vowel sound or a silent (mute) h.

Examples:
- mon amie (not *ma amie) — my (female) friend
- ton école (not *ta école) — your school
- son heure (not *sa heure) — his/her hour
- mon hôtel (not *ma hôtel) — my hotel (h is silent here)

Note: Some words start with an "aspirated h" (h aspiré) and do not allow this elision; those cases behave like consonants. If in doubt, check a dictionary or listen to a native speaker.

Formal vs informal "your"

French has two different "your" forms:
- ton / ta / tes — for one person you address informally (tu)
- votre / vos — for one person you address formally (vous) or when you address multiple people (vous)

Examples:
- Ton frère est sympa. (talking to a friend)
- Votre frère est sympa. (talking to someone formally or to several people)

Ambiguity and how to disambiguate (son/sa/ ses = his / her / its)

Son / sa / ses show possession but do not indicate the gender of the possessor. They match the noun possessed. So "son livre" can mean "his book", "her book", or "its book".

- Pierre a pris son livre. — Pierre took his book. (clear because subject is Pierre)
- Marie a pris son livre. — Marie took her book. (also clear because subject is Marie)

If the possessor is not obvious from context, clarify with de + name or à + lui/à elle:
- C'est le livre de Marie. — It's Marie's book.
- C'est son livre à elle. — It's her book (emphasis / clarify).

Possessive adjectives vs possessive pronouns

Possessive adjective = placed before a noun: mon livre, sa maison, nos amis.
Possessive pronoun = replaces a noun and often appears with a definite article: le mien, la mienne, les miens, les miennes, le tien, la tienne, etc.

Examples:
- C'est mon livre. — That's my book. (possessive adjective)
- C'est le mien. — That's mine. (possessive pronoun)
- J'aime ta voiture, mais la mienne est plus ancienne. — I like your car, but mine is older.

Special use: reflexive verbs and body parts

When using reflexive verbs to talk about body parts, French often uses the definite article (le / la / les) instead of a possessive adjective. This is a common pattern and differs from English.

Examples:
- Je me lave les mains. — I wash my hands. (not *Je me lave mes mains in typical speech)
- Il se brosse les dents. — He brushes his teeth.
- Elle s'est coupé le doigt. — She cut her finger.

You can still use possessive adjectives in other contexts (Ses mains sont propres. — Her hands are clean.), but with reflexive actions prefer the article.

Common mistakes and how to fix them

- Mistake: Using the possessor's gender to choose the form.
- Wrong: Marie a perdu son maman.
- Fix: Marie a perdu sa maman. (maman is feminine → sa)

- Mistake: Using ma/ta/sa before a feminine noun beginning with a vowel.
- Wrong: *Ma amie est en retard.
- Fix: Mon amie est en retard.

- Mistake: Confusing leur and leurs.
- Wrong: *Ils ont vendu leurs maison.
- Fix: Ils ont vendu leur maison. (if they sold one shared house) or Ils ont vendu leurs maisons. (if each sold their own house)

- Mistake: Using possessive adjectives with reflexive verbs for body parts.
- Wrong: *Je me lave mes mains.
- Fix: Je me lave les mains.

- Mistake: Translating English "its" directly without checking gender.
- Example: The company changed its logo. → La société a changé son logo. (logo is masculine → son)

Quick reference: full list of French possessive adjectives

- 1st person singular (my): mon / ma / mes
- 2nd person singular (your, informal): ton / ta / tes
- 3rd person singular (his / her / its): son / sa / ses
- 1st person plural (our): notre / nos
- 2nd person plural/formal (your): votre / vos
- 3rd person plural (their): leur / leurs

Remember: choose the form according to the gender and number of the noun that follows.

Short examples summary (French → English):
- Mon père est médecin. — My father is a doctor.
- Ma sœur habite ici. — My sister lives here.
- Mes amis viennent ce soir. — My friends are coming tonight.
- Ton livre est intéressant. — Your book is interesting.
- Sa maison est grande. — His/her house is big.
- Notre chat est noir. — Our cat is black.
- Vos enfants jouent dehors. — Your children are playing outside.
- Leurs enfants ont trois ans. — Their children are three years old.

Glossary

Possessor: the person or thing that owns or is related to something (I, you, he, she, we, they).

Possessed noun: the thing that is owned or related to (book, house, friend). The possessive adjective agrees with this noun.

Agreement: matching gender (masculine/feminine) and number (singular/plural) between the possessive adjective and the noun.

Elision: dropping a vowel and replacing it with an apostrophe or changing the word for pronunciation reasons; here it explains why we use mon/ton/son before a vowel-starting feminine noun.

h muet (silent h): some French words start with an h that is not pronounced; they behave like vowels for elision purposes (mon amie, mon hôtel).

Possessive pronoun: a word that replaces a noun to show possession (le mien, la tienne, les nôtres). It is not the same as possessive adjective.

Summary

- Choose the possessive adjective that matches the gender and number of the noun that follows, not the possessor.
- Use mon/ton/son before feminine nouns that begin with a vowel sound or mute h.
- Use notre/votre/leur when the possessor is plural or formal; these forms do not change with gender.
- For reflexive actions on body parts, French prefers the definite article (le/la/les) rather than a possessive adjective.

If you remember these rules and pay attention to the noun that follows the possessive, you will avoid the most common errors. Plenty of short practice (reading and listening) will help you feel the tiny pronunciation rules (like mon amie) naturally.