Consider a few sentences:
- I read a lot.
- ?I read much.
- I don't read a lot.
- I don't read much.
- Do you read much?
This seems to suggest "much" is a negative polarity item, but then we can say things like "Much of it has to do with you not being here." So how much of a negative polarity item is "much"?
I am particularly interested in existing literature on this.