Some / Any

• some: affirmative statements, offers, requests and in questions when you expect the answer "yes"

• any: negative statements, questions
  Have you got any bananas? No, we haven't got any. But we've got some oranges.

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

http://www.englisch-hilfen.de/en/exercises/confusing_words/some_any2.htm

http://www.englisch-hilfen.de/en/exercises/confusing_words/some_any3.htm