My, your, his/her — choosing the right form. French possessives agree with the noun they modify, not the owner's gender.
Three things to internalise. One: French possessives agree with the noun they describe, not with the owner. Mon frère and ma sœur both mean "my [sibling]" — the form changes because frère is masculine and sœur is feminine, not because of who is speaking. Two: Before a vowel or silent h, use mon/ton/son even for feminine nouns — mon amie, not ma amie. This is a liaison/euphony rule, not a gender exception. Three: son/sa/ses means his, her, or its — the same form covers all three. Context tells you which owner is meant. This skill covers the three singular possessors: 1st person (mon/ma/mes), 2nd person informal (ton/ta/tes), and 3rd person (son/sa/ses).
Which possessive fits the blank?