Unit 8 - The Continuous Forms

For understand better the the Continuous Forms I maked a graffic that explain me better. Also I maked a practice... 

http://www.ego4u.com/en/cram-up/grammar/present-progressive/form/exercises?form02

http://www.ego4u.com/en/cram-up/tests/past-progressive-1

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