"¿Cuáles son sus libros?"
Translation:Which ones are his books?
Why is it not "your" books as sus seems to be used for your in a different question about shoes.
I would say "your books" would also be correct if you're using the polite form (usted).
Why does it have to be "his books" and not "her books"? Isn't sus used for both men and women?
Hola hlemon: It could be HIS, HER, THEIR or YOUR. Duo just picked one. The others are correct also.
in english we say your books, but in spanish it is like esay yours books, so your is also plural. their is wrong because we are still talking about one persons books not several persons books.
it is "yours" because it refers to the plural noun, in this case books rather then a book, or shoes in the other case
Why is the accent over the a in "Cuáles"? I thought the default accent was the second-to-last vowel?
Hola amigo stormont: All question words carry an accent mark: cuál, cuáles, qué, cuándo, cuánto, cuántos, cómo, qué, quién, quiénes, etc. Here are the rules of stress: 1. If a word ends in a e i o u n or s, the stress is on the second to the last syllable (no accent mark). 2. If a word ends in a consonant other than n or s, the stress goes on the last syllable (no accent mark). 3. If the stress goes anywhere other than as stated in Rules 1 and 2, the word must carry an accent mark. (These are in addition to the question words I mentioned above..) CHAU
...and I probably should have googled that before posting. It seems tus is informal and sus is formal.