In French, the possessive adjectives agree in gender and number with the noun which follows.
For example:
“his brother” & “her brother” would both be: son frère
“his sister” & “her sister” would both be: sa sœur
One common exception to the formation rules listed below is that the forms mon, ton, and son will be used before feminine nouns that begin with a vowel or a mute ‘h’.
Forming Possessive Adjectives
| SINGULAR | PLURAL | ||
| Masculine | Feminine | Masculine & Feminine | |
| my your (informal) his, her, its, one’s our your (formal and plural) their | mon ton son notre votre leur | ma ta sa notre votre leur | mes tes ses nos vos leurs |
Example Sentences
Voilà ma valise. There’s my suitcase.
Voilà mes valises. There are my suitcases.
Où est leur hôtel? Where is their hotel?
Où sont leurs livres? Where are their books?