THE PRESENT CONTINUOUS

SPELLING RULES

SUGGESTED WEBSITES

http://www.englishpage.com/verbpage/presentcontinuous.html
http://www.perfect-english-grammar.com/present-continuous.html
https://www.englishclub.com/esl-games/grammar/jumbled-tenses-present-continuous-1.htm
http://www.really-learn-english.com/present-progressive-exercises.html
http://www.agendaweb.org/verbs/present_continuous-exercises.html 
http://www.myenglishpages.com/site_php_files/grammar-exercise-present-progressive.php#.VRK7vo5crgw