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