In the sentence you’re looking at, "finished" can be an adjective or a past participle used in a passive construction, depending on the context. Here’s how it works:
As an Adjective:
When "finished" describes a state of being (for example, “I am finished with my work”), it functions as an adjective, meaning “complete” or “done.” Here, "finished" is used to indicate that something is in a completed state.
As a Verb (Past Participle):
If "finished" is part of a verb phrase like “He has finished his homework,” it acts as the past participle of the verb finish. In this case, it's working with an auxiliary verb (has) to form the present perfect tense.
In summary:
Adjective: Describing a completed state (“I am finished.”)
Past Participle of a Verb: Forming a perfect tense (“He has finished.”)
Let me know if you’d like examples of each!