Possessive adjectives 1

Short-form possessives go before the noun — The short forms — mi/mis, tu/tus, su/sus, nuestro/a/os/as, vuestro/a/os/as — always come directly before the noun they modify. They agree with the noun possessed, not with the owner: mi libro, mis libros, nuestra casa, nuestros amigos.

Su / sus covers six meanings — Su can mean his, her, its, your (formal), or their — the noun it precedes determines number and gender, not who owns it. When context is ambiguous, clarify with de + pronoun: el coche de él / de ella / de usted / de ellos.

No article before a possessive — Unlike English ("the my book" is wrong in both languages), Spanish never uses an article before a short-form possessive adjective: just mi libro, not el mi libro. The article returns only with the long-form possessives after the noun: un amigo mío.