EJERCICIOS REFUERZO Y NIVELACIÓN  8°

http://www.nspeak.com/newbasic/grammatica/presperfect.htm
http://www.english-grammar-lessons.com/presentperfect/exercise2.swf
http://www.english-grammar-lessons.com/presentperfect/exercise9.swf
http://www.english-4u.de/pres_perf_ex2.htm
http://www.montsemorales.com/gramatica/PresPerfJust.htm
http://eslus.com/LESSONS/GRAMMAR/PASSIVE/Gramc.htm
http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-present-2
http://www.redcamelot.com/camelot/exercises/SEPT26/Grammar/Passive%20Voice/Exercise%202.htm

http://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-present
http://learningapps.org/12735
http://www.english-grammar-lessons.com/passive/exercise2.swf
http://www.ego4u.com/en/cram-up/grammar/passive/exercises?02
http://faculty.mdc.edu/kbiache/ferriswheels.htm
http://www.eslgamesplus.com/passive-voice-past-passive-esl-grammar-sentence-activity-fun-game-online/
http://www.eslgamesworld.com/members/games/grammar/basketball/active%20vs.%20passive%20voice/active%20vs.%20passive%20voice.html

9°
http://www.englishpage.com/verbpage/verbs18.htm
http://www.englishpage.com/verbpage/verbs19.htm
http://www.englishpage.com/verbpage/verbs20.htm
http://baladre.info/english/sedaviwebfront/goingtowill.htm
http://www.englishgrammarsecrets.com/goingtoorwill/exercise2.swf
http://baladre.info/english/sedaviwebfront/futuremixed4.htm
http://www.better-english.com/grammar/decisions.htm