PRESENT SIMPLE
Tutorial
http://www.englishpage.com/verbpage/simplepresent.html
http://www.ego4u.com/en/cram-up/grammar/simple-present
With be
http://www.oup.com/elt/global/products/englishfile/elementary/a_grammar/file01/grammar01_a01/
http://www.bradleys-english-school.com/online/flashmultiplechoice/mc_amisare.html
http://www.juntadeandalucia.es/averroes/ceip_san_tesifon/recursos/ingles/act_interactivas/cuestionarios/tobeneg_1.htm
http://www.ice.urv.es/eoiact/level1/fernando/familytobe.htm
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?06
http://www.englisch-hilfen.de/en/exercises/tenses/be.htm
http://www.englisch-hilfen.de/en/exercises/tenses/be2.htm
http://www.englisch-hilfen.de/en/exercises/questions/be.htm
http://www.englisch-hilfen.de/en/exercises/questions/be.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=2318
With have got
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?07
http://www.englisch-hilfen.de/en/exercises/tenses/have_got.htm
http://www.englisch-hilfen.de/en/exercises/tenses/have_not_got.htm
http://www.englisch-hilfen.de/en/exercises/tenses/have_got_questions.htm
With auxiliary do
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises
http://www.englisch-hilfen.de/en/exercises/tenses/do.htm
http://www.englisch-hilfen.de/en/exercises/tenses/do_does.htm
Mixed exercises
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?02
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?03
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?04
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?05
http://www.ego4u.com/en/cram-up/grammar/simple-present/use/exercises
http://www.ego4u.com/en/cram-up/grammar/simple-present/use/exercises?02
PRESENT CONTINUOUS
Tutorial
http://esl.about.com/od/grammarstructures/a/prescont.htm
http://www.ego4u.com/en/cram-up/grammar/simple-past
http://www.ego4u.com/en/cram-up/grammar/present-progressive/form
http://www.ego4u.com/en/cram-up/grammar/present-progressive/exceptions
http://www.ego4u.com/en/cram-up/grammar/present-progressive/summary
http://www.englishpage.com/verbpage/presentcontinuous.html
Exercises
http://www.eclecticenglish.com/grammar/PresentContinuous1F.html
http://www.grammarnet.com/ghtml/present/exprescont1.htm
http://www.englisch-hilfen.de/en/exercises/tenses/present_progressive_mix.htm
http://www.ego4u.com/en/cram-up/grammar/present-progressive/use/exercises
http://www.englishexercises.org/makeagame/viewgame.asp?id=2126
PRESENT SIMPLE OR PRESENT CONTINUOUS
Tutorial
http://www.ego4u.com/en/cram-up/grammar/simpre-prepro
Exercises
http://www.englishpage.com/verbpage/verbs1.htm
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/simcon1.htm
http://www.englishlearner.com/tests/present_simple_continuous_quiz_1.shtml
http://a4esl.org/q/h/vm/sp_or_pc.html
PAST SIMPLE
Tutorial
http://www.ego4u.com/en/cram-up/grammar/simple-past
http://www.englishgrammarsecrets.com/pastsimple/menu.php
http://www.perfect-english-grammar.com/past-simple.html
With be
http://www.englisch-hilfen.de/en/exercises/tenses/was_were.htm
http://www.englisch-hilfen.de/en/exercises/tenses/was_not_were_not.htm
With regular verbs
With irregular verbs
http://www.englishlearner.com/tests/irregular_past_verbs_matching_1.shtml
http://www.bradleys-english-school.com/online/jigword/jigpast1.html
Mixed exercises
http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises
http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_mix.htm
http://www.englishgrammarsecrets.com/pastsimple/exercise1.html
http://www.englishgrammarsecrets.com/pastsimple/exercise2.html
http://speakspeak.com/a/html/d3a008_english_grammar_beginners_past_simple_questions.htm
PRESENT PERFECT
Tutorial
http://www.englishpage.com/verbpage/presentperfect.html
http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple
http://www.colegioweb.com.br/ingles/present-perfect.html
Exercises
http://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_statements.htm
http://www.better-english.com/grammar/presentperfect1.htm
http://fog.ccsf.cc.ca.us/~mbibliow/presentperfect3-1.html
http://www.englisch-hilfen.de/en/complex_tests/present_perfect1/index.php
