Interrogative Pronoun vs. Adjective: Key Differences & Examples
Interrogative pronouns (who, what, which) stand alone to ask about people or things. Interrogative adjectives (which, what, whose) cannot stand alone; they modify nouns to ask about specific details.
We mix them up because both start with the same words. In a quick text like “Which meeting?” the word feels like a pronoun, but it’s actually an adjective pinning down the noun “meeting.” That silent noun dependency is the hidden trap.
Key Differences
Pronoun: replaces the noun. “What happened?” Adjective: leans on the noun. “What time works?” Swap them and the sentence breaks.
Which One Should You Choose?
If the question word is followed by a noun, it’s an adjective—use whose/which/what. If the word ends the question and nothing follows, it’s a pronoun—pick who/what/which.
Examples and Daily Life
Pronoun: “Who called?” Adjective: “Whose call was that?” Pronoun: “What’s new?” Adjective: “What news did you get?” Spot the noun after the question word to decide.
Can an interrogative adjective ever become a pronoun?
No. If it modifies a noun, it stays an adjective. Drop the noun and it shifts role.
Is “whose” always an adjective?
Almost. In “Whose is this?” it acts like a pronoun because “is” fills the noun slot.
Why do native speakers still confuse them?
Speech is fast; we skip nouns mentally, so the distinction blurs until we slow down and edit.