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."
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.
No. Easier is an adjective. The adverb form is easily.
Adverb
It can be an adverb or an adjective.
it hasnt
hasnt
He hasnt.
he hasnt
it hasnt
he hasnt
it hasnt
No he hasnt.
she hasnt yet ;)
it hasnt
no she hasnt
she hasnt died!