Countable and uncountable nouns

Here you can find some information about this grammar topic.

https://learnenglish.britishcouncil.org/en/grammar-reference/countable-uncountable-nouns-1

http://www.edufind.com/english-grammar/countable-and-uncountable-nouns/


http://www.myenglishpages.com/site_php_files/grammar-exercise-countable-uncountable-nouns.php#.VMpkwdKG9A0