What's the opposite sentence of "you have so much money"?

Question

What's the opposite sentence of "You have so much money"? Can I use "You have so little money"?

Or this: "You have so many hours to work", is using "You have so few hours to work" correct?

Answer 1

Yes, “little” is the opposite of “much”, and “few” is the opposite of “many” (when they have these meanings). “So” can modify any of those adjectives, so your sentences are correct.

Answer 2

Those phrases are opposite:

much to little, many to few

So they are correct as opposite sentences. You can check this link for further information.