4-7. The 4 kinds of tense : The perfect tense, the perfect progressive tense and the active voice

This video deals with the 4 kinds of tense in the active voice: the past perfect tense, the past perfect progressive tense, the present perfect progressive tense, and the future perfect progressive tense in the active voice.
I hope that the intensive practice for tense helps us to improve the understanding of the gap between the present when the speaker states the clause and the point in time when the definition of the verb happens.
Thank you for watching. ^^