Participle... Yes, one of the nominal forms ending in “ADO” and “IDO” and that expresses a meaning, an idea of an action that has already taken place. In this way, read, heard, spoken, listened to, studied, run, in short... However, other aspects are attributed to the form in question, given that it is precisely in this form noun that reside the so-called abundant verbs and, if they are so characterized, it is because there are two forms: O regular participle it's the irregular participle.
In light of this reality, some questions, such as “had it paid” or “had it paid”, “had it delivered” or “had it delivered”, tend to stand out significantly. Thus, we always feel questioned about which way to use it, as it is about the particularities, like those portrayed in the subtitle. And, talking about them, it becomes important that they are incorporated into our knowledge.
In this sense, given the standard mode of language, some assumptions must be taken into account, such as:
* In front of auxiliary verbs
She had delivered the documentation in the secretariat.
* In front of auxiliary verbs BEING or BEING, we must make use of the irregular form.
the copies were delivered at the secretariat.
So that we can further enhance our knowledge of the subject in question, let's find more examples, which address both ways:
With the forms HAVE or HAVE:
ON
EXPULDED
KILLED
DEAD
ARRESTED
SUSPENDED...
With the BEING or BEING forms:
ON
EXPULD
DEAD
STUCK
SUSPENDED...
By Vânia Duarte
Graduated in Letters
Source: Brazil School - https://brasilescola.uol.com.br/gramatica/participio-uma-forma-nominal-dotada-particularidades.htm