8A/8B/7A PRESENT PERFECT VS PAST SIMPLE

WATCH
https://www.youtube.com/watch?v=Dkln8PfE1xE

AND MORE


SOME REVISION:
PRESENT PERFECT ONLY
https://www.youtube.com/watch?v=ODt_xD5OhK8

PAST SIMPLE ONLY

WAS/WERE
https://www.youtube.com/watch?v=_W035xTqkL4

PAST SIMPLE OTHER VERBS
https://www.youtube.com/watch?v=QlZXd-m6Pdw

https://www.youtube.com/watch?v=Xs9_64pxISc