Whose is a possessive pronoun like ‘her’, ‘his’, ‘our’ and etc… We use WHOSE to find out which person something belongs to. Whose is the possessive form of who.
- Whose car is this ?
- Whose notebook was stolen in the class?
- The child whose bicycle has been lost cried.
- The girl whose bag is red is looking for you.
- The boy whose dog bit my daughter last week called me to say sorry.
- Whose keys are you using?