PRESENT CONTINUOUS

http://www.agendaweb.org/verbs/present-continuous/index.html

http://www.agendaweb.org/exercises/verbs/present-continuous-2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2502#a

http://www.montsemorales.com/gramatica/PresCont0.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2364

https://www.englishclub.com/grammar/verb-tenses_present-continuous_quiz.htm

http://www.eclecticenglish.com/grammar/PresentContinuous1F.html