Present continuous exercises

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

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

PRESENT CONTINUOUS USE

http://www.englisch-hilfen.de/en/grammar/pres_pro.htm

ADVERBS OF FREQUENCY

EXPLANATION AND EXERCISES 

http://www.englisch-hilfen.de/en/grammar/adverbien1.htm


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#.VE_ztL5QZ8w

PRESENT SIMPLE

HERE YOU HAVE SOME EXERCISES

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


http://www.agendaweb.org/verbs/present_simple-exercises.html