Past simple -past continuous
https://www.english-4u.de/en/tenses-exercises/past-simple-or-progressive2.htm
http://digitalcampus.free.fr/Level2/Unit21/SubUnit211/BirdHopped01.jqz.htm
https://www.ego4u.com/en/cram-up/grammar/simpas-paspro/exercises?ex04
Present perfect
https://www.ego4u.com/en/cram-up/grammar/present-perfect-simple/exercises
http://www.focus.olsztyn.pl/en-present-perfect-tense-exercises-with-answers.html
Present perfect continuous
https://www.ego4u.com/en/cram-up/grammar/present-perfect-progressive/exercises
https://www.eltbase.com/quiz/151_02.htm
https://www.youtube.com/watch?v=B6uuIHpFkuo&fbclid=IwAR1mJedWVJm9WKvOTn88EeiKkxSvdQ2tBe3umUjr1ld8Tl0etrgG0l3x4JI
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