I have come across
もう一つ multiple times now, and I know it means "another one", but I'm struggling to understand it's grammatical function in a sentence.
It looks like the combination of the adverb
もう and the counter
一つ, so is it a compound phrase or an independent word?
I've seen it modify nouns (e.g.
もう一つリンゴ, "another apple"), kind of like an adjective.
I've also seen it in other positions in a sentence (e.g.
リンゴをもう一ついかがですか。, "Would you like another apple?"). In this case, it seems to modify the sentence predicate.
I guess my question is, grammatically speaking, what is
もう一つ? I haven't been able to find enough information/clarification in my studies.
Thank you very much for your help!