Let's practice the difference between Present Perfect and Simple Past


http://www.learn4good.com/languages/evrd_grammar/presentp_exc.htm

Present Perfect


http://www.eslgamesworld.com/members/games/grammar/perfectpast/New/present%20perfect%20continuous.html
http://learnenglish.britishcouncil.org/en/grammar-exercises/present-perfect
http://learnenglish.britishcouncil.org/en/grammar-exercises/just-yet-still-already