Perfect Passive Participles in Latin

Ancient Latin works sometimes contain perfect passive participles. Such verbal adjectives are employed:

1) Adjectivally (e.g., Laudamus glorificatum Deum)

2) Substantivally (e.g., Scimus adjutos a Petro)

3) As the equivalent of an adverbial clause (e.g., Puer, a diacano monitus, ecclesiam intravit)

All of the examples above come from ecclesiastical Latin.

See https://books.google.com/books/about/A_Primer_of_Ecclesiastical_Latin.html?id=rqoXOW6LmVMC