why do you have to have du (some) if its just asking for bread please
Why doesn't "S'il vous plaît, du pain" work? Is it really incorrect?
same reason in english we say do in "do you play football?" instead of "you play foot ball?"
Is the "Le" really required? The sentence is "Bread please!" not "The bread please!"
Yes, it's required. In French you should always use the article of the object.