SOME AND ANY

SOME	We use "some" in positive sentences. We use some for both countable and uncountable nouns.Example: I have some friends.
ANY	We use "any" in negative sentences or questions. We use any for both countable and uncountable nouns.Example: Do you have any cheese? - He doesn't have any friends in Chicago.
EXCEPTION!	We use "some" in questions when offering or requesting something that is there.Example: Would you like some bread? (offer) - Could I have some water? (request)

PRACTICE...

http://www.englisch-hilfen.de/en/exercises/confusing_words/some_any.htm

http://autoenglish.org/gr.some.i.htm

http://www.ego4u.com/en/cram-up/vocabulary/some-any

http://speakspeak.com/english-grammar-exercises/elementary/some-any-difference

http://esl.fis.edu/grammar/multi/some.htm