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
Present Perfect / Past Perfect Present Perfect Continuous / Past Perfect Continuous http://www.englishpage.com/verbpage/verbs14.htm
present perfect: simple and continuous http://learnenglishteens.britishcouncil.org/grammar-vocabulary/grammar-videos/present-perfect-simple-and-continuous