Hi! I have a question.
The sentence "Ask any of your teachers!" uses the word "any". But in school, we learned that any is used in negative sentences and in questions. Is this sentence irregular and why can you use any in this sentence?
'Any' is also frequently used in "if-sentences". In affirmative sentences (like yours) where the idea is that "each of them is the same -- it doesn't matter which one", using 'any' is also normal. It means "any one or ones of your teachers" and therefore is different in meaning from 'some'.
Your sentence is quite standard IMO. This is a well-known usage.