Present Simple and Present Continuous

These are some webs where you can review Present Simple and Present Continuous tenses: 

- http://www.perfect-english-grammar.com/grammar-exercises.html

- http://learnenglishkids.britishcouncil.org/en/grammar-practice/present-simple-and-present-continuous

- http://chagall-col.spip.ac-rouen.fr/IMG/didapages/presentcont/index.html

- http://www.eslgamesworld.com/members/games/grammar/index.html