Perfect Continuous
Present Perfect Continuous
1. https://engfairy.com/the-present-perfect-continuous-tense-uprazhneniya/
2. https://speakenglishwell.ru/present-perfect-continuous-uprazhneniya/
3. https://www.learnesl.net/present-perfect-continuous-tense-exercises/
4. https://lizasenglish.ru/grammatika/present-perfect-continuous-upr.html
Past Perfect Continuous
1. http://grammar-tei.com/past-perfect-continuous-uprazhneniya/
2. https://lizasenglish.ru/grammatika/past-perfect-continuous-upr.html
3.
Future Perfect Continuous
1. http://grammar-tei.com/future-perfect-continuous-pravila-primery-i-uprazhneniya/
2. http://englishvoyage.com/exercises/future-perfect-continuous/future-perfect-continuous-exercise-1
3. http://englishvoyage.com/exercises/future-perfect-continuous/future-perfect-continuous-exercise-2
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