Imperfecto o Preterito

http://youtu.be/LHxnqP9Dh9o

http://youtu.be/K8qW3hATXlw

http://www.youtube.com/watch?v=907MN6lwsKA&feature=related

http://www.youtube.com/watch?v=9sK9yPWdItk&feature=related

 

Flashcards Time expressions for past tense  http://quizlet.com/_syfx

http://users.ipfw.edu/jehle/courses/pretimp.htm

http://www.cliffsnotes.com/study_guide/Quiz-Preterite-Imperfect-Formulas.topicArticleId-250661,articleId-250623.html

http://www.cliffsnotes.com/study_guide/Preterite-Imperfect-Formulas.topicArticleId-250661,articleId-250622.html

http://www.cliffsnotes.com/study_guide/Quiz-Verbs-That-Change-Meaning-in-the-Preterite.topicArticleId-250661,articleId-250621.html

 

Mucho practica con preterito e imperfecto

http://conjuguemos.com/list.php?type=fillin&division=grammar&language=spanish

 

http://www.drlemon.com/Grammar/pretvsimp.html

http://www.spanishspanish.com/verb/practice_pret_imperf_web.html

http://www.123teachme.com/learn_spanish/preterite_vs_imperfect_b

 

 Muchos cuentos con el pasado   http://www.colby.edu/~bknelson/SLC/pret_imp.php