Adjective or passive?

[hey_friends]

i'm appreciated.
i'm understood.
i'm done.
i'm finished.
are these adjective or passive?i'm very confusing about it.

 

[Tdol]

The first two can be rewritten:
People appreciate me.
People understand me.
This suggests that they are passive. The last two are adjectival; the person is either tired or has finished. There's a grey area where it can be unclear whether a past participle is being used as an adjective or in a passive, but you can always try putting by... after it. If it's hard or impossible, then it'll be an adjective in most cases.

 

[riverkid]

i'm appreciated.
i'm understood.
i'm done.
i'm finished.
are these adjective or passive?i'm very [confusing] confused about it.

What you want is,

"I'm confused about it" means that the material confuses you.

'ing' usually means that the effect is on/directed at someone else.

"I'm confusing about it" means that you confuse others, HF. So this sentence sounds unnatural.

We can use "I'm confusing" to say,

I'm always confusing the twins.