Present Perfect Simple & Progressive

Formation and usage (Bildung und Verwendung):

• https://www.ego4u.com/en/cram-up/grammar/prepersim-preperpro

Exercises (various types) on the right side of the page:

• http://www.englishgrammarsecrets.com/presentperfectsimpleorcontinuous/menu.php

Gap fill exercises:

• http://esl.fis.edu/grammar/multi/ppsppc.htm
• http://www.englishpage.com/verbpage/verbs8.htm
• http://www.englishpage.com/verbpage/verbs7.htm
• http://www.perfect-english-grammar.com/present-perfect-present-perfect-continuous-1.html

Video (and script) using present perfect simple/progressive:

• http://learnenglishteens.britishcouncil.org/grammar-vocabulary/grammar-videos/present-perfect-simple-and-continuous