No, it isn't an adverb. The word hasn't is a contraction of "has not" which includes a helper verb and the adverb "not."
Adverb
It can be an adverb or an adjective.
adverb
No, you is a pronoun not and adverb as its is defining a noun Adverb adds more to a verb like he is walking *fast*
No it is not. Largest is an adjective. The adverb form is largely.
it hasnt
hasnt
he hasnt
He hasnt.
he hasnt
it hasnt
it hasnt
No he hasnt.
she hasnt died!
She hasnt yet
no he hasnt he plays for argentina
it hasnt i hope