Q: Also, whenwhy?
A: you have 'what' (among an infinite amount of permutations), you have 'which' (among a smaller, finite number of choices), you have 'yes/no', you have 'when' (expecting a time), you have 'why', which expects some explanation for something, you have 'where' which expects a place, you have 'how' which expects a method for something, you have 'how much', which expects a quantity, and you have 'how many' which usually expects a whole number. those are all i can think of now