www.agendaweb.org/verbs/present_perfect_continuous-exercises.html
www.eclecticenglish.com/grammar/PresentContinuous1F.html
www.usingenglish.com/quizzes/66.html
www.perfect-english-grammar.com/grammar-exercises.html
www.englishpage.com/verbpage/verbs1.htm
www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive2.htm
www.english-4u.de/pres_prog_ex4.htm
a nakonec pár her..
www.eslgamesplus.com/action-verbs-present-tenses-esl-interactive-grammar-vocabulary-game/
www.eslgamesworld.com/members/games/grammar/present%20tenses/present%20tenses%20hangman.html
www.eslgamesworld.com/members/games/grammar/present%20tenses/present%20tenses%20snakes%20and%20ladders.html