Present simple exercises / to be:

http://personal.telefonica.terra.es/web/pilar-cordoba/1eso/to_be/tobe1.htm

http://www.tmc.ac.kr/~esl/verbs/to-be01.html

http://www.tmc.ac.kr/~esl/verbs/to-be02.html

http://www.oup.com/elt/global/products/englishfile/elementary/a_grammar/file01/grammar01_a01/

http://nathalieb.com/interactive/View/exercices/hotpotNat/grammar/pp314_descriptions/descriptions_3_n.htm

http://www.parapal-online.co.uk/exercises/is_are.html

http://www.woodward.cl/QEToBe.htm

http://www.1-language.com/englishcourse/unit2_grammar_exs.htm

http://www.learn-english-online.org/Lesson1/Work/Introductions1.htm

Present simple exercises

http://www.oup.com/elt/global/products/headway/beginner/a_grammar/grammarunit06/hwy_begin_unit06_1/

http://www.tmc.ac.kr/~esl/spelling/verbs01.html

http://www.learnenglish.be/EX_g2_t_prsi_ex1.htm

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-8216.php

http://www.oup.com/elt/global/products/englishfile/elementary/a_grammar/file02/grammar02_a02/

http://www.english-4u.de/present_ex1.htm

http://www.learn-english-online.org/Lesson12/TestIt/TestPresSimpNeg.htm

http://www.learn-english-online.org/Lesson13/TestIt/Question1.htm

http://roble.cnice.mecd.es/~fmap0009/grammar/3eso/3esopresentsimple/3esopresentsimple1.htm

http://www.kico4u.de/english/uebungen/aktiv/myday.htm

Present continuous

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/pcont1.htm

http://usuarios.lycos.es/englishweb/vocabulario/PresContActions1.htm

http://www.learnenglish.be/EX_gram1_prco.htm

http://www.learn-english-online.org/Lesson7/TestIt/PresCont1.htm

http://www.juntadeandalucia.es/averroes/recursos_informaticos/andared02/the_happy/tenses/exercises/present_cont_1.htm

http://www.ego4u.com/en/cram-up/grammar/present-progressive/form/exercises?form02

http://roble.cnice.mecd.es/~fmap0009/grammar/3eso/3esopresentcontinuous/01prescont.htm

http://perso.orange.fr/michel.barbot/3T/prs_ing/exo1.htm

http://www.members.iinet.net.au/%7Eadelegc/grammar/pres_cont/pres_cont_1.html

Present simple or Present continuous

http://www.kico4u.de/english/uebungen/aktiv/preprog1.htm

http://odl.vwv.at/english/odlres/res8/Grammar/grammar_exercises/tenses/present/present1.htm

http://roble.cnice.mecd.es/~fmap0009/grammar/4eso/prescontrast4eso/05prescontrast4eso.htm

http://www.xtec.es/~eromo2/englishgate/elementary/presents1.htm

http://www.english-4u.de/pres_prog_ex3.htm

http://www.english-4u.de/pres_prog_ex4.htm

http://english.specialist.hu/a3/xgg/ppres1.htm

http://imtcsamba.hct.ac.ae/cconline/year1/hotpot/hwbeg_u11/11cont_simple2/11cont_simple2.htm

Present perfect exercises:

1) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?03

2) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?04

3) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?05

4) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?06

5) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?07

6) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises?08

7) http://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises

8) http://www.ego4u.com/en/cram-up/tests/present-perfect-simple-1 

   Past Simple exercises:

1) http://www.english-room.com/pasttense_6b.htm

2) http://skyblues67.chez-alice.fr/simppast/whqsregjumb1.htm

3) http://www.englisch-hilfen.de/en/exercises/s_past2.htm

4) http://www.bradleys-english-school.com/online/MultipleChoice/past.html

5) http://www.englishlab.net/past_simple3.htm

6) http://www.ego4u.com/en/cram-up/tests/simple-past-3

7) http://www.english-grammar-lessons.com/irregularverbs/exercise5.swf

8) http://www.ego4u.com/en/cram-up/tests/simple-past-2 

  Present Perfect or Past Simple?

1) http://www.english-grammar-lessons.com/presentperfectorpastsimple/exercise1.swf

2) http://www.oup.com/elt/global/products/englishfile/elementary/a_grammar/file09/grammar09_b01/

3) http://www.oup.com/elt/global/products/englishfile/elementary/a_grammar/file09/grammar09_b02/

4) http://www.kico4u.de/english/uebungen/aktiv/preperfmix.htm

5) http://www.bnv-bamberg.de/home/ulrich.koch/flg/englischinteraktiv/tenses-past-perfect.htm

6) http://www.bnv-bamberg.de/home/ulrich.koch/flg/englischinteraktiv/tense-past-perfect3.htm

7) http://esl.fis.edu/grammar/q7g/f-10.htm

8) http://esl.fis.edu/grammar/multi/f-4.htm

 Listening activities

1) http://www.members.iinet.net.au/%7Eadelegc/listening/a_busy_day/a_busy_day.html

2) http://www.britishcouncil.org/kids-stories-numbers-popup.htm

2) http://www.members.iinet.net.au/%7Eadelegc/listening/at_the_beach/beach.html

3) http://www.members.iinet.net.au/%7Eadelegc/listening/letter_to_a_friend/letter.html

4) http://www.tolearnenglish.com/free/audio/3g.php

5) http://netgrammar.altec.org/Units/Unit_8/a101c8_301000.html

6) http://www.esl-lab.com/hotel1/hotel1.htm#pre

7) http://netgrammar.altec.org/Units/Unit_12/a101c12_301000.html

Reading activities (lower intermediate)

http://www.scolagora.com/ste.philo/Anglais/quatrieme/exo1.htm

http://www.scolagora.com/ste.philo/Anglais/quatrieme/exo80.htm

http://web2.uvcs.uvic.ca/elc/studyzone/330/reading/shop1.htm

http://web2.uvcs.uvic.ca/elc/studyzone/200/reading/smicat1.htm

http://imtcsamba.hct.ac.ae/cconline/year1/sem1/hotpotcomplete/hwu8/elvis/elvis.htm

http://imtcsamba.hct.ac.ae/cconline/year1/hotpot/hwbeg_u13/13diana/13diana.htm

http://bits.westhost.com/interact/sets/detailed/detailed13/detailed13.htm

http://bits.westhost.com/interact/sets/match16/match16.htm

 Songs (for ....children)

1) http://www.gfes.tpc.edu.tw/board/abc-song/ThisIstheWay.swf

2) http://www.bbc.co.uk/cbeebies/somethingspecial/songs/oldmac.shtml

3) http://www.gfes.tpc.edu.tw/board/abc-song/happy.swf

4) http://www.gfes.tpc.edu.tw/board/abc-song/kumbayah.swf

Some websites containing a lot of exercises on vocabulary, grammar, listening, reading

 http://www.agendaweb.org (best exercises from different websites vocabulary, grammar, verbs, listening)

http://www.englisch-hilfen.de/en/exercises_list/alle_grammar.htm

http://www.learn4good.com/languages/evr_english_grammar.htm

http://englishonline.sites.uol.com.br/english/basic.htm

http://esl.fis.edu/grammar/index.htm

http://www.english-4u.de

http://www.speakspeak.com/html/d3_english_resources_grammar_practice.htm