Review on tenses (GRAMMAR):

http://www.grammarbank.com/verb-tenses.html

Activities on Present simple / continuous:

http://www.englishpage.com/verbpage/verbs2.htm

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/simcon2.htm (future sense)

Activities on Past simple / continuous:

http://www.englishpage.com/verbpage/verbs4.htm

http://www.isabelperez.com/happy/tenses/exercises/past_cont_3.htm

Present perfect continuous (GRAMMAR):

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

Difference present perfect / present perfect continuous (GRAMMAR):

http://www.aulafacil.com/Ingejerc/Lecciones/Lecc21.htm) (SPANISH)

Activities on present perfect / present perfect continuous:

http://www.aulafacil.com/Ingejerc/Lecciones/Ejerc21.htm

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex02

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex03

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex06

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex07

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex08

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex09

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex10

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/exercises?ex11

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/tests?test1

http://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro/tests?test2

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5898.php

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-2029.php

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-27838.php

Activities on present perfect / simple past / past perfect:

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-23351.php

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-18094.php

Activities on PRESENT / PAST:

http://www.englishpage.com/verbpage/verbs17.htm

Activities on ANY tense in the PAST:

FUTURE:

Activities on future tenses (mixed):

http://www.eslmania.com/students/grammar/Grammar_Quizzes/simple_future.htm

http://www.learnenglishfeelgood.com/mixed-future-tenses1.html

http://www.learnenglishfeelgood.com/mixed-future-tenses2.html

http://www.learnenglishfeelgood.com/mixed-future-tenses3.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=7229

http://esl.about.com/library/quiz/blgrquiz_futureforms.htm

http://www.vitutor.com/gramatica_inglesa/verb_tense/future_ej16.html

https://www.ego4u.com/en/cram-up/grammar/future-mix/exercises

TENSE REVIEW:

http://esl.about.com/od/advancedgrammar/a/a_tname.htm (Complete text. Do it IN YOUR NOTEBOOK. Then press NEXT below to get the answers)

http://www.eflnet.com/grammar/verbtense.php

http://www.eflnet.com/grammar/verbtense2.php

http://www.grammarbank.com/verb-tenses-exercises.html

http://www.grammarbank.com/verb-tenses-exercise.html

http://www.grammarbank.com/mixed-verb-tenses-exercise.html

http://www.grammarbank.com/verb-tenses-mixed-exercise.html

http://www.ego4u.com/en/cram-up/tests/language-course

http://www.ego4u.com/en/cram-up/tests/london-dungeon

http://www.myenglishpages.com/site_php_files/grammar-exercise-tenses.php

http://www.englishpage.com/verbpage/verbs29practicetest.htm

http://www.englishpage.com/verbpage/verbs30finaltest.htm

http://www.english-4u.de/tenses_exercises.html    (DO MIXED TENSES AT THE END OF THE SITE)