English Grammar: How to Use Relative Pronouns Where/When/Whose in Adjective Clauses. English Level: Intermediate, Upper-Intermediate. Language Focus: An explanation of how to use the relative pronouns where, when, and whose. Includes several exercises. Adjective clauses are used to describe a noun in the main sentence. In the example above, the adjective clause tells us about "the man." Just ignore the main sentence and look at the adjective clause when deciding whether to use "who," "whom" or "whose." Ask yourself if the adjective clause requires a subject, object, or possessive form. Adjective Clauses with WHOSE. Let's practice adjective clauses with WHOSE. Study these examples: I know the policeman. His dog bit a man. --> I know the policeman whose dog bit a man. I bought an antique vase. Its value is priceless. --> I bought an antique vase whose value is priceless. MNUeR1.