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"Profesora" is a form of "profesor", a noun which is often translated as "teacher". "Son sus libros" is a phrase which is often translated as "they're his books". Learn more about the difference between "son sus libros" and "profesora" below.
son sus libros(
sohn
soos
lee
-
brohs
)A phrase is a group of words commonly used together (e.g., once upon a time).
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. (formal) (second person singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
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?
el profesor, la profesora(
proh
-
feh
-
sohr
)This means that the noun can be masculine or feminine, depending on the gender of the noun it refers to (e.g., el doctor, la doctora).
1. (educator)
b. instructor
Contrató a una profesora de esquí para mejorar sus habilidades.He hired a ski instructor to improve his abilities.
c. professor (university) (United States)
Regionalism used in the United States
Los profesores de mi universidad son los mejores.The professors at my university are the best.
d. lecturer (university) (United Kingdom)
Regionalism used in the United Kingdom
El profesor de mi clase de italiano es muy difícil de entender.The lecturer in my Italian class is very difficult to understand.
