19 Unbelievable Complaints People Had About Their Recent Vacations http://www.knowable.com/a/19-unbelievable-complaints-people-had-about-their-recent-vacations?utm_content=inf_10_3136_2&tse_id=INF_a21e47bd4f974fa39bb9a1a58280fc92
past participle hangman http://www.eslgamesworld.com/members/games/grammar/perfectpast/present%20perfect%20hangman.html
present perfect game A1, A2 http://www.eslgamesworld.com/members/games/grammar/perfectpast/spin%20wheel%20present%20past%20tenses.html
present perfect vs. past simple http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_present_perfect.htm
present perfect drill (yet, just, already) http://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_already_yet.htm
present perfect drill http://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_statements.htm