An Abstract Form: #2 The Abstract Past Participle

In this video, I introduce yet another one of my new terms: The Abstract Past Participle. I thoroughly explain how the Past Participle of a Normal Verb can have a function OTHER than that of a traditional Verbal.

This video's Study Phrase: Having sanded
Abstract Pro-Form: Having (see previous video)
Abstract Past Participle: sanded

The Abstract Pro-Form (in this case, "having") seems to naturally bind with an Abstract Past Participle (in this case, "sanded").
NOTE: Some grammar experts might refer to "sanded" as a PERFECT Participle. That logic would be in line with the contemporary name "Gerund-Participle Perfect" for the phrase "Having sanded." However, as the word "sanded" used in the Perfect tense is the exact same un-inflected word as that used in the Past Basic tense, I play it safe side by simply holding to the term "Past" in "Abstract Past Participle. Technically speaking, you unwittingly enter the "abstract" realm when a word spelled exactly as the Past Participle is referred to as "Perfect"—AND is paired with a word which we now know is an "Abstract" Pro-Form.

Ultimately, then, in my own personal sick-and-twisted grammar system, I recognize THREE main Participles:
Present Participle (as Adjective or Noun Complement):
A "sanding" block makes sanding easier."
Past Participle (as Adjective or Noun Complement):
The "sanded" wood feels very smooth."
The chair "sanded," he sat comfortably."
Abstract Past Participle:
Having "sanded" the entire wall, you may now apply the primer.

NOTE: The Gerund does indeed present in "Present Participle" form, but because it functions as a Noun, I've not included it in this group.