http://www.eslgamesplus.com/present-progressive-continuous-esl-grammar-fun-game-online/
http://www.agendaweb.org/verbs/present_continuous-exercises.html
https://learnenglishkids.britishcouncil.org/en/grammar-practice/present-simple-and-present-continuous
http://learnenglishteens.britishcouncil.org/grammar-vocabulary/grammar-videos/present-continuous
Gracias
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