Present continuous

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

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

http://www.englishexercises.org/makeagame/viewgame.asp?id=2357

http://www.kico4u.de/english/uebungen/5klasse/presprofrag.htm