PRESENT PERFECT  (EXPLICACIÓN)


http://www.aprenderinglesfacil.es/2008/06/presente-perfecto-present-perfect-tense.HTML

http://www.curso-ingles.com/gramatica-inglesa/present-perfect.php

http://www.blueblocnotes.com/grammar/present-perfect/present-perfect

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

http://www.perfect-english-grammar.com/present-perfect-exercises.HTML

http://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_statements.htm

http://www.really-learn-english.com/present-perfect-exercises.HTML

http://www.agendaweb.org/verbs/present_perfect-exercises.HTML






YET, ALREADY

http://aprendeinglessila.com/2013/05/presente-perfecto-just-already-yet-since-for/

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-17335.php

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/prperf1.htm

http://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_already_yet.htm

http://www.adelescorner.org/grammar/pres_perfect/pres_perfect_yet.HTML

http://www.vitutor.com/gramatica_inglesa/verb_tense/present_perfect_ej11.HTML



SINCE VS FOR


http://menuaingles.blogspot.mx/2007/02/since-for.HTML

http://ingles.about.com/od/gramatica/a/For-O-Since-Preposiciones-De-Tiempo.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=1394

http://www.agendaweb.org/grammar/for_since_already-exercises.HTML

http://www.grammarbank.com/since-vs-for-exercises.HTML

http://www.eclecticenglish.com/grammar/PresentPerfect1D.HTML

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-3647.php

FREQUENCY ADVERBS

http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adverbs_of_frequency.htm

http://www.myenglishpages.com/site_php_files/grammar-exercise-adverbs-frequency.php#.VIkb4hs5D6U

http://www.agendaweb.org/grammar/adverbs-exercises.HTML

https://elt.oup.com/student/solutions/elementary/grammar/grammar_02_012e?cc=mx&selLanguage=en

http://www.englishexercises.org/makeagame/viewgame.asp?id=1400

http://www.ecenglish.com/learnenglish/lessons/frequency-adverbs

http://www.grammar-quizzes.com/adv_frequency.HTML

https://www.englishclub.com/grammar/adverbs-frequency_quiz.htm

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-28491.php

http://www.bastrimbos.com/Hotpotatoesfiles/advfreq2.htm

http://learnenglishkids.britishcouncil.org/en/grammar-games/adverbs-frequency

 TELLING THE TIME

http://www.englisch-hilfen.de/en/exercises/various/time.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=3352

http://www.agendaweb.org/vocabulary/time-exercises.HTML

http://www.agendaweb.org/vocabulary/time-telling-exercises.HTML

http://www.esl-lab.com/eslbasic/clocks-watches-1.htm

http://resources.woodlands-junior.kent.sch.uk/maths/measures.htm

PREPOSITIONS OF PLACE



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

http://www.englishexercises.org/makeagame/viewgame.asp?id=597

http://www.englishexercises.org/makeagame/viewgame.asp?id=17

http://www.perfect-english-grammar.com/prepositions-of-place-exercise-1.HTML

http://www.myenglishpages.com/site_php_files/grammar-exercise-prepositions.php#.VISjcxstB7g

http://s.mound.free.fr/skyblues67/prepositions/preposqcm.htm

http://www.groovetoenglish.com/placeprep.htm

http://www.agendaweb.org/grammar/prepositions-exercises.HTML

PREPOSITIONS OF TIME

 
 http://www.englisch-hilfen.de/en/grammar/preposition_time.htm (EXPLICACIÓN)

http://www.englisch-hilfen.de/en/exercises/structures/prepositions_at_in_on_time.htm

http://www.ego4u.com/en/cram-up/grammar/prepositions/exercises?02

http://www.englishexercises.org/makeagame/viewgame.asp?id=5278

http://www.perfect-english-grammar.com/time-prepositions-exercise-2.HTML

http://www.englishpage.com/prepositions/time_prepositions_1.htm

http://www.agendaweb.org/grammar/prepositions-of-time-exercises.HTML

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

http://www.better-english.com/grammar/timepreps.htm

WHAT ARE THEY DOING?

PRESENT PROGRESSIVE EXERCISES

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

http://www.really-learn-english.com/present-progressive-exercises.HTML

http://www.englisch-hilfen.de/en/exercises/tenses/present_progressive_mix.htm

http://www.agendaweb.org/verbs/present_continuous-exercises.HTML

http://www.eclecticenglish.com/grammar/PresentContinuous1F.HTML

http://www.englishexercises.org/makeagame/viewgame.asp?id=2431

http://www.englishpage.com/verbpage/presentcontinuous.HTML

http://www.perfect-english-grammar.com/present-continuous.HTML