TOEFL CLIFFS GRAMMAR : PAST PERFECT _ Khmer Explanation

In this video, you are going to learn "Past Perfect" which taken from TOFEL CLIFFS : TOEFL PREPARATION GUIDE book. I hope you enjoy this video. Any question or suggestion, let's me know in the comment box. If you enjoy this video, please click like this video and subscribe this channel. Link to watch "Past Perfect" in detail: https://youtu.be/ifjMePnnpv8