1º BTO:
La Négation:
http://www.hku.hk/french/starters/structures/02_negation.htm
http://www.lepointdufle.net/p/negation.htm#expression
http://www.lepointdufle.net/ressources_fle/negation1.htm
http://www.trainfrench.com/French/Grammaire/Exos_grammaire/negation/Audio/ecoutez_repondez_pop_up.htm
3ºESO
L´Imparfait:
http://www.lepointdufle.net/imparfait.htm
http://juantortiz.wikispaces.com/file/view/FICHE_IMPARFAIT.pdf
http://www.tapis.com.au/studentbook2/Unit10/u10_grammaire_a01.html
http://www.didieraccord.com/exercices/index.php?ex=4.3.2