El imperfecto

Conjugacion del imperfecto http://www.studyspanish.com/lessons/imp1.htm

Conjugacion del imperfecto http://www.spanishdict.com/topics/show/59

http://www.quia.com/ba/31465.html
http://www.quia.com/pop/10816.html

http://www.123teachme.com/games/tank/category/preterite_ar_verbs_1

http://www.sporcle.com/games/Ubbiebubbie/-the-spanish-imperfect-tense-
http://www.colby.edu/~bknelson/SLC/pret_imp.php historia del super hombre/ risitos de oro etc
http://quizlet.com/1502941/preterite-vs-imperfect-flash-cards/ tarjetas para estudia dif entre pret e impt
http://www.elmaeagles.com/gameobjects/sv6.html

http://www.quia.com/rr/489648.html

http://www.quia.com/hm/544837.html

http://www.quia.com/hm/544875.html

http://www.quia.com/rr/489674.html

http://www.quia.com/cz/274765.html

http://www.quia.com/cb/477440.html

http://www.spanishdict.com/topics/practice/59

http://www.learnspanishfeelgood.com/verbs-regular-imperfect1.html

https://www.quia.com/quiz/305018.html?AP_rand=307177295

http://berks.psu.edu/spanish/impPractice/

https://www.quia.com/cb/503415.html

http://study.com/academy/lesson/the-imperfect-tense-in-spanish.html