"That is their book."
Translation:Det er boken deres.
I'm a bit confused.. doesn't 'deres' mean 'yours' (pl) only? Or does it mean 'theirs' as well?
Am I correct to say that when they use personal pronouns it always happens in a form such as "the book (of) yours" or "the cat (of) mine?" Basically, is it always: the + noun + possessive pronoun?