To say “yours” in Spanish, use the possessive pronoun “tuyo/tuya/tuyos/tuyas.” “Tuyo” is used for masculine singular nouns, “tuya” for feminine singular nouns, “tuyos” for masculine plural nouns, and “tuyas” for feminine plural nouns. For example, “Tu libro” means “your book.” Note that the possessive pronoun must agree in gender and number with the noun it modifies.