Nominal (present participle)
The person (or thing) singing;
(the singer)
The (person or) thing being sung;
(the song)
The person (or thing) being sung to;
(the "recipient")
The person or thing being sung about;
(the song topic)
Nominal (past participle)
The person (or thing) having sung
The (person or) thing having been sung
The person (or thing) having been sung to
The person or thing having been sung about
Adjectival (present participle)
singing
A book (telling) about war.
I see my father working in the shed.
being sung
the book that is (being) given to me
being sung to
the child being sung to about the hero
being sung about
The war mentioned (=told about) in this book.
Adjectival (past participle)
having sung
having been sung
having been sung to
having been sung about
Adverbial (manner)
singing
He read smiling(ly).
being sung
being sung to
being sung about
Nominal (gerund)
the (act of) singing
Working in the garden doesn't fit you.
the (act of) having sung