Here are the common interrogative pronouns:
* Who: Refers to people. *Example: Who is coming to the party?
* Whom: Also refers to people, but is used as the object of a verb or preposition. *Example: Whom did you invite?
* Whose: Refers to possession. *Example: Whose book is this?
* What: Refers to things or ideas. *Example: What is your favorite color?
* Which: Refers to a choice from a limited set of options. *Example: Which dress should I wear?
Key characteristics of interrogative pronouns:
* Always begin a question.
* Can stand alone or be part of a phrase. *Example: Who will you go with? vs. To whom will you go?
* Act as the subject or object of the verb in the sentence.
Understanding interrogative pronouns is essential for building grammatically correct and meaningful questions.