whose - correct spelling

relative pronoun and interrogative pronoun

Note: Good writers use whose as the possessive case of which to avoid a stilted “of which” construction. Those who use the latter insist that whose must refer to an animate antecedent, i.e., a person or other living thing. See the examples below.

Grammar.com’s section on Problem Words discusses whose and who’s. Click here for that discussion.

Example: They liked to visit Washington, whose monuments and museums were open to all. relative pronoun

Example: They liked to visit Washington, the monuments and museums of which were open to all. (Stilted version.)

Example: Whose book is this? interrogative pronoun