WIKI DE LECTURA

PRESENT PERFECT http://www.montsemorales.com/gramatica/PresPerf1.htm http://suz.digitaleschulebayern.de/english/grammar/presperfs4.htm http://www.english-grammar-lessons.com/presentperfect/exercise2.swf http://perso.ya.com/mjandres/archivos/presentperfect1.htm PRESENT SIMPLE http://www.eflnet.com/grammar/presentagreement.php http://www.focus.olsztyn.pl/en-present-simple-free-exercises.html#.Vw9lorbz3h4 SIMPLE -CONTINUOUS http://esl.fis.edu/grammar/multi/1.htm http://www.focus.olsztyn.pl/en-present-simple-present-continuous-quiz.html PAST SIMPLE regular http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_ed.htm irregular www.englishexercises.org/makeagame/viewgame.asp?id=2562 PAST CONTINUOUS http://www.focus.olsztyn.pl/en-exercises-past-continuous-test-1.html#.Vw9mwbbz3h4

www.agendaweb.org/verbs/present-simple/index.html http://www.agendaweb.org/exercises/verbs/present-forms.htm http://www.englishmaven.org/HP6/Present%20Tense%20Exercise%206.htm