Can anybody tell me exactly how many interrogative adjectives does English have? I have been researching for many days.
Some places say that there are only three interrogative adjectives: which, what, and whose. Other places say that all question words that come before a noun are interrogative adjectives, for example "why John left the college," etc. If there are only three than why can't other question words like when, why, whom, where, etc. be interrogative?
Please provide the best answer, if possible with proof.