past progressive

AFFIRMATIVE (+)

https://www.englisch-hilfen.de/en/exercises/tenses/past_progressive_statements.htm

http://www.focus.olsztyn.pl/en-exercises-past-continuous-test-1.html#.Xih6fW5Fwy8

http://www.adelescorner.org/grammar/past_cont/past_cont_1.html

https://www.englisch-hilfen.de/en/exercises/tenses/past_progressive_statements2.htm

NEGATIVE (-)

https://www.englisch-hilfen.de/en/exercises/tenses/past_progressive_negation_sentences.htm

https://www.englisch-hilfen.de/en/exercises/tenses/past_progressive_statements2.htm

https://first-english.org/english_learning/english_tenses/past_progressive/43_past_progressive_negative_exercises.htm



INTERROGATIVE (?)

https://www.englisch-hilfen.de/en/exercises/questions/past_progressive.htm


https://www.englishclub.com/grammar/verb-tenses_past-continuous-quiz.htm


MIX (+)(-)(?)

https://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises

https://www.english-4u.de/en/tenses-exercises/past-progressive2.htm 

http://www.perfect-english-grammar.com/past-continuous-exercise-1.html