Knowing the differences between these two tenses : Past Perfect and Imperfect. Learning when to use one or the other, and the different information they communicate : Completed action, repeated action, continuous action.
I'll also review (quickly) the conjugation of the two tenses.

To find out about my courses: https://francaispourexpats.com/
And on FB:   / francaispourexpats  

0:00 Intro
1:16 Past Perfect tense (Conjugation)
3:50 Past Perfect tense (Use)
4:25 Imperfect tense (Conjugation)
5:09 Imperfect tense (Use)
6:56 Present vs Past
7:14 Zoom in / Zoom out
9:04 Practice with a text