"Whose" is a possessive pronoun like "his," "her" and "our." We use "whose" to find out which person something belongs to.
Examples of whose questions:
Whose in relative clauses
We use whose to introduce a relative clause indicating possession by people, animals and things:
- John works with that other chap whose name I can’t remember.
- Shirley has a 17-year-old daughter whose ambition is to be a photographer.
- This is the book whose title I couldn’t remember.