sample paper and excercice of present perfect progressive tense
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https://www.meritnation.com/ask-answer/question/what-is-a-format-of-present-perfect-continuous-tense/english/4145573
https://www.meritnation.com/ask-answer/question/what-is-the-formula-of-past-perfect-tense-present-perfect-co/tenses/2431612
https://www.meritnation.com/ask-answer/question/the-president-of-india-resides-in-an-estate-in-new-delhi-kno/tenses/6619493
https://www.meritnation.com/ask-answer/question/what-is-a-format-of-present-perfect-continuous-tense/english/4145573
https://www.meritnation.com/ask-answer/question/what-is-the-formula-of-past-perfect-tense-present-perfect-co/tenses/2431612
https://www.meritnation.com/ask-answer/question/the-president-of-india-resides-in-an-estate-in-new-delhi-kno/tenses/6619493