Present Perfect Simple or Present Perfect Continuous Tense? (perfect-english-grammar.com)
https://www.englisch-hilfen.de/en/exercises/tenses/present_perfect_or_progressive.htm
http://www.adelescorner.org/grammar/pres_per_cont/pres_cont_s_or_cont.html
https://www.englishpage.com/verbpage/verbs8.htm
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