Here are the common interrogative pronouns in English:
* Who: Used for people
* Example: Who is coming to the party?
* Whom: Used for the object of a verb or preposition (often replaced by "who" in informal speech)
* Example: Whom did you invite?
* Whose: Used to ask about possession
* Example: Whose book is this?
* What: Used for things or ideas
* Example: What is your favorite color?
* Which: Used to ask about a choice from a limited set of options
* Example: Which dress should I wear?
* Why: Used to ask for a reason
* Example: Why are you late?
* When: Used to ask about time
* Example: When will you be home?
* Where: Used to ask about location
* Example: Where did you find that?
* How: Used to ask about manner or process
* Example: How did you get here?
Key points to remember:
* Interrogative pronouns always begin a question.
* They act as the subject or object of the question.
* They replace nouns or noun phrases that are unknown.
Let me know if you'd like more examples or have other questions!