Participles can function as simple adjectives…
I ran away from the barking dog. The player avoided the thrown ball
In these instances, the participles typically appears IN FRONT OF the noun it modifies.
Participles can take direct objects or be modified by prepositional phrases, creating PARTICIPIAL PHRASES…
I ran away from the dog, barking loudly at me. The player avoided the ball, (having been) thrown by the rookie pitcher.
In these instances, the participial phrase is marked off with commas.
Finally, Participles can function as substantive adjectives; that is, they serve as both NOUN and ADJECTIVE.
The defeated surrendered on the field = the defeated (men/people/army)
This is a phenomenon that doesn’t often occur with the present participle in English, but is very common in Latin.
Note: The noun (or pronoun) expressed in the Ablative Absolute is never the subject of the sentence. If we wish to say “When she was departing, the woman saw the lion,” we cannot use the Ablative Absolute, because the subject of each clause (“she” and “woman”) is the same. Instead, a simple participle is used: Fēmina discēdēns leōnem vīdit.