So, we use "some" in affirmative sentences and "any" in negative ones and in questions.
Oh yes, indeed!Note that we tend to use some instead of any when we expect a positive answer to the questions we are asking:
Would you like some more pasta and salad? ~ No,thanks. I'm quite full.
Shall I send you some information about our new products? - Yes, please do.
Could you get me some rice when you go shopping?
As for different uses of any , I found this quite helpful.
bea :-D
I'd advise to start with the basics and afterwards explain the exceptions to the rule (which you have explained very well here, Bea, I must say)