In relation to this question, 'How much of their schoolwork do the children do at home?' This is the correct answer according to a text, 'All of it.'
A teacher told me that 'all' in that answer is a noun.
I know that after and adjective 'all' is always a noun like in the following:
I didn't give it my all.
He puts his all in every game.
My question is, how do I know that the word 'all' is a noun in that phrase? What tells me that it is a noun. How can I easily recognize when 'all' is a noun?
Thanks in advance.
With personal pronouns, we use 'all of' + object form, don't we?
In the given answer, 'all of it', 'it' substitudes 'their homework', doesn't it?