French possessive adjectives - mon, ton, son

Possessive adjectives (French: les adjectifs possessifs) in French are used to signify that one person or thing belongs to another and is usually placed in front of the noun they refer to. 

List of possessive adjectives in French

Note that mon, ton and son are used before feminine nouns or adjectives beginning with a vowel or silent h. 

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How to use possessive adjectives in French

Make sure that the possessive adjective always agrees in number and gender with the noun that is modified, not with the person who owns that thing.

• mon frère (my brother)
• ma soeur (my sister)
• mes fréres (my brothers)

Bear in mind that the equivalent of your in French is ton/ta/tes for someone you call tu (informal), or votre/vos for someone you call vous (very formal).

The possessive adjective must be repeated before each noun.

• Je dois écrire à ma soeur. (I have to write my sister.)
• Il parle à mon oncle. (He speaks to my uncle.)

Note that possessive adjectives are NOT used when you're referring to parts of the body, clothing, mental faculties or if the possessor is clearly indicated by the indirect object pronoun that has been used before the verb.

Use le, la, l' or les instead:

• Il a perdu la mémoire. (He lost his memory.)
• Elle lui a fait mal au bras. (She hurt his arm.)