Yes it is the present participle of the verb pass.
Some present participle verbs about death are dying, expiring, or passing on.
'(il/elle) dit' - he/she says/is saying - 'dit' can also be the past participle - said.
Being is the present participle. The past participle is been.
The past participle of do is done. The past participle of have is had.
The present participle is beating. The past participle is beat.
Present participle - winding Past participle - winded
The present participle is "sowing" and the past participle is "sown".
Begun is the past participle, and beginning is the present participle.
The past participle of am is been. Not does not have a past participle
The present participle is swelling. The past participle is swelled.
The past participle is proceeded. The present participle is proceeding.
The past participle is "seen", and the present participle is "seeing".