Present Progressive
Haz clic below to watch a video on the Present Progressive. Write down as many phrases in the present progressive as you can
.http://www.teachertube.com/view_video.php?viewkey=9a395a636ed944a28b51
Now go to the following site to do more practice with the Present Progressive
http://www.studyspanish.com/practice/presprog.htm Section C has all E to IE stem changers BUT with the gerund/present participle the E in the stem changes to just an I. For example This only happens with –ir stem changing verbs (NOT –ar or –er verbs).

http://www.colby.edu/~bknelson/exercises/pres_prog.html
http://www.quia.com/cb/201178.html
http://www.quia.com/hm/120729.html
http://www.quia.com/quiz/1201860.html?AP_rand=1818169202
http://www.quia.com/rr/166665.html