Present Simple

PRESENT SIMPLE (AFFIRMATIVE)
http://www.ego4u.com/en/cram-up/grammar/simple-present/use/exercises?05
http://www.english-room.com/4_01.htm
http://www.kico4u.de/english/uebungen/aktiv/sorno.htm
http://www.members.iinet.net.au/~adelegc/grammar/present_simple/pres_simple4.html
http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/pres1.htm
http://www.members.iinet.net.au/~adelegc/grammar/present_simple/pres_simple3.html
http://www.english-room.com/presentsimple_02.htm
http://www.carmenlu.com/first/grammar/present1_1pos.htm
http://www.esl-lounge.com/student/grammar/1g1-present-simple-gap-fill.php
http://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?02
http://www.1-language.com/englishcourse/unit3_grammar_exs2.htm
http://www.kico4u.de/english/uebungen/aktiv/week.htm


PRESENT SIMPLE NEGATIVE
 http://www.youtube.com/watch?v=tM6k-Ebd3Ic
http://a4esl.org/q/h/lb/psnv.html 
http://englishlearner.com/tests/present_simple_negative_sentences.shtml http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/presnq1.htm






PRESENT SIMPLE INTERROGATIVE
http://fresno.pntic.mec.es/~igam0003/HotPotatoesStuff/1ESO/1-ESO-Unit%203/PSInterrogatives.htm
http://englishatsantacruz.blogspot.com/2011/08/present-simple-interrogative-form.html
http://www.englisch-hilfen.de/en/exercises/questions/simple_present.htm
http://www.english-4u.de/present_ques_ex2.htm