Here you have some web pages to check your English...
--Must /musn't: http://www.englishexercises.org/makeagame/viewgame.asp?id=2786
http://www.englishexercises.org/makeagame/viewgame.asp?id=5140
--Can / can't: http://www.englishexercises.org/makeagame/viewgame.asp?id=5204
--Abilities: http://www.englishexercises.org/makeagame/viewgame.asp?id=7223
--Can and Must: http://www.englishexercises.org/makeagame/viewgame.asp?id=7521
http://www.agendaweb.org/vocabulary/food-exercises.html
http://learnenglishkids.britishcouncil.org/en/grammar-games/nouns-countable-and-uncountable
http://www.mansioningles.com/gram16.htm
http://www.mansioningles.com/gram16_ej1.htm
http://www.mansioningles.com/gram13.htm
http://www.agendaweb.org/grammar/comparison-exercises.html
http://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs
