意大利語(yǔ)語(yǔ)法：意大利語(yǔ)的所有格

As a rule, the Italian possessive adjectives are preceded by definite articles:
    la mia camicia (my shirt)
    il nostro amico (our friend)
    i vostro vicini (your neighbor)
    i suoi libri (his/her books)
    One exception is made for idiomatic phrases such as these:
    a casa mia (my house)