exeercices

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

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

http://learnenglishkids.britishcouncil.org/en/your-turn/seasons