son sus libros

son sus libros(
sohn
 
soos
 
lee
-
brohs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. they're his books (masculine)
¿Son esos los libros de tu hermano? - Sí, son sus libros.Are those your brother's books? - Yes, they're his books.
b. they're her books (feminine)
Esos libros son de Marta. - Si son sus libros, ¿por qué están en tu mochila?Those books are Marta's. - If they're her books, why are they in your backpack?
c. are his books (masculine)
¿Se ha ido ya Pedro? - No creo, esos que hay ahí son sus libros.Has Pedro already left? - I don't think so. Those over there are his books.
d. are her books (feminine)
¿Los libros de Isabel son los que están en esta estantería? - Sí, esos son sus libros.Are Isabel's books the ones on this shelf? - Yes, those are her books.
2.
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
(formal)
(second person singular)
a. they're your books
Si son sus libros, lléveselos a su cuarto.If they're your books, take them to your room.
b. are your books
Los que están encima de la mesa son sus libros, ¿verdad?Those on the table are your books, aren't they?
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