This document defines and provides examples of common interrogative pronouns in English including: who, whom, whose, what, which, how, when, where, and why. It explains that who is used as a subject, whom as an object, and whose to indicate possession. What can refer to things, people, or situations. Which is used to choose between specific options. How is used to ask about manner, degree, frequency, quantity or duration. When asks about time and where asks about location. Why asks about reasons or causes.