Some and Any

1. SOME is used in affirmative sentences with countable and uncountable nouns. 

ex: I´d like some sugar.

2. SOME is used in questions when they mean an offer or request on a restaurant.

ex: Can I have some cake? ; Would you like some soda,   please?

3. ANY is used for questions and  negative sentences with countable and uncountable nouns.

ex: Is there any sugar in this coffee? ; Do you have any brothers and sisters? ; I didn´t buy any apples.

4. The rules are the same for the compounds: 

* someone * anything * anybody * somewhere, etc.
ex: I have something for you; Hello? is anybody here? 
     There isn´t anywhere to go in my town