It is hung or hanged, depending on the meaning. A picture is hung on a wall; a person is hanged on a gallows.
No, "have been" is not a present participle. It is the present perfect tense of be. Being is the present participle of be.
The present participle is beginning.
The present participle is beginning.
The present participle is cutting.
The present participle is breaking.
Hung is both the simple past tense and the past participle of hang.
Getting is the present participle of get.
The present participle is doing.
Being is the present participle. The past participle is been.
Presenting is the present participle of present.
Presenting is the present participle of present.
The present participle is choosing.
The present participle is walking.
The present participle is cleaning.
The present participle is shaking.
The present participle is coming.
The present participle is searching.