The phrase refers to a specific Spanish grammar exercise commonly found in digital learning platforms like Course Hero or VHL Central . The exercise focuses on possessive adjectives and the use of the verb ser to identify ownership (e.g., "¿De quién es...?" meaning "Whose is...?").
It sounds like you're working through the "¿De quién es?" (Whose is it?) section of Estructura 1 , which is commonly found in Spanish 1 textbooks like Vista Higher Learning (VHL) Central This specific exercise (often labeled ) focuses on possessive adjectives (my, your, his, her, etc.) and using the preposition to show ownership. The Pattern p219 estructura 1 de quien es practice it exclusive
: Adjectives like su and sus must agree with the object owned , not the owner. Even if there are two owners, if they own one house, you use the singular su casa . The phrase refers to a specific Spanish grammar