GRAMMAR

TENSE REVIEW 
http://www.englisch-hilfen.de/en/exercises/tenses/mix.htm 
http://www.englisch-hilfen.de/en/exercises/tenses/mix2.htm 
http://theenglishcafe.blogspot.com.es/2009/11/exercise-mixed-tenses.html 
http://www.ego4u.com/en/cram-up/tests/hadrians-wall 
http://www.tolearnenglish.com/english_lessons/mixed-tenses-test 
http://ro.sio.si/~viljenka/mixed_tense.htm
http://www.englishpage.com/verbpage/verbs30finaltest.htm
http://www.englishpage.com/verbpage/verbs29practicetest.htm

http://www.englishpage.com/verbpage/verbtenseintro.html

http://www.ego4u.com/en/cram-up/tests/language-course
http://personales.ya.com/mjandres/archivos/mixedtensessent.htm
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-8197.php
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5050.php
http://www.ihbristol.com/learn-online/exercise-general/intermediate/grammar/more-tenses/221/
http://www.nonstopenglish.com/allexercises/grammar/grammar-tenses.asp
http://www.myenglishpages.com/site_php_files/grammar-exercise-tenses.php
http://www.english-4u.de/grammar_exercises.htm
http://teacher.eduhi.at/english_by/Ex,5,03_1.htm
http://www.tolearnenglish.com/english_lessons/mixed-tenses-test

PAST CONTINUOUS

AFFIRMATIVE SENTENCES

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises?04

NEGATIVE SENTENCES

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises?05

INTERROGATIVE SENTENCES

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises?07

MIXTURE

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-30994.php

WHEN / WHILE

http://www.bcfint.com/ex_esp_ing/ex_ing_past_continuous_01.htm

 PRESENT PERFECT WITH "FOR" AND "SINCE"

 http://www.eclecticenglish.com/grammar/PresentPerfect1D.html
http://www.englisch-hilfen.de/en/exercises/confusing_words/since_for.htm
http://www.telefonica.net/web2/eseducativa/forsince.html
http://www.ejerciciodeingles.com/ejercicios-present-perfect-for-since-ago-rellenar-huecos/
http://www.ejerciciodeingles.com/ejercicios-expresiones-tiempo-for-since-ago-quiz/
http://www.ejerciciodeingles.com/ejercicios-distinguir-for-since-ago-rellenar-huecos/
http://www.aulafacil.com/Ingejerc/Lecciones/Ejerc33.htm
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/upperf1.htm

PRESENT PERFECT 

http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple
http://ies1libertas.edu.gva.es/departamentos/ingles/PDFs/tercero/epresp3e1.pdf
http://edition.tefl.net/ideas/grammar/fun-present-perfect-activities/
http://esl.about.com/od/Find-the-Mistake/a/Present-Perfect-Worksheets.htm
http://www.eslflow.com/presentperfecttenselessonplans.html
http://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_statements.htm
http://www.vivquarry.com/wkshts/presperfex.html

IRREGULAR VERBS

http://www.englishforeveryone.org/Topics/Irregular-Verbs.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=1642
http://www.englishexercises.org/makeagame/viewgame.asp?id=1646
http://www.englishexercises.org/makeagame/viewgame.asp?id=1994
http://www.englisch-hilfen.de/en/exercises_list/verbs.htm
http://www.juntadeandalucia.es/averroes/recursos_informaticos/concurso2005/17/irregular_verbs2_1eso.jmt.htm
http://www.juntadeandalucia.es/averroes/recursos_informaticos/concurso2005/17/irregular_verbs2_3eso.jcl.htm
http://ingles20-adela.blogspot.com.es/2011/05/irregular-verbs-exercises.html
http://www.classtools.net/widgets/quiz_2/coDyR.htm
http://www.madridteacher.com/Activities/Files/irregular-verbs-list.htm
file:///C:/Documents%20and%20Settings/WINDOWSXP/Escritorio/irregular%20verbs/irregular%20verbs%20flashcards.htm