Past Perfect Continuous

 E 

Exercises

http://www.autoenglish.org/gr.pastperfcon.pdf


Preparation for the test

https://www.ecenglish.com/learnenglish/lessons/third-conditionals-and-mixed-conditionals

https://www.englishpage.com/verbpage/verbs14.htm

https://www.englishpage.com/verbpage/verbs13.htm

http://www.esl-lounge.com/student/grammar/3g59-present-past-perfect-continuous-error-exercise.php