Some
We can use some in positive sentences with plural countable nouns
We can use some in positive sentences with uncountable nouns
Any
We can use any in negative sentences with plural countable nouns
We can use any in negative sentences with uncountable nouns
We can use any in questions with plural countable nouns
We can use any in questions with plural uncountable nouns

http://learn-english-online.org/Lesson38/Lesson38.htm