http://www.perfect-english-grammar.com/simple-present-exercises.html

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

https://www.youtube.com/watch?v=5vJOJrVIgek

https://learnenglish.britishcouncil.org/es/grammar-reference/just-yet-still-already

https://www.ego4u.com/en/cram-up/tests/present-perfect-progressive-3

http://www.scoalastefancelmarefocsani.ro/engleza/ready_made_test_worksheets/Intermediate_2.pdf

http://www.englishpage.com/verbpage/verbs30finaltest.htm

https://www.youtube.com/watch?v=mOQ_VnC6dtU

http://www.really-learn-english.com/past-perfect-progressive-exercises.html

http://www.macmillaninspiration.com/inspired/files/2012/07/Grammar-EXTRA_Inspired_2_Unit_4_Simple_future_will_wont.pdf

http://www.perfect-english-grammar.com/english-language-pdf.html

For more exercises