No. It may be a pronoun, adjective, or conjunction.
both is so an adverb!
Isn't is a contraction of both a verb and an adverb. Is (verb) not (adverb).
both
the word" comfortable " can be used both ways as an adverb or adjective.
The adverb in your sentence is 'thereafter'.
Not both together. Go is a verb, and back is the adverb.
Yes the word "early" can be both an adjective and an adverb.
"Seldom" can function as both an adverb and an adjective. As an adverb, it modifies a verb. Example: "She seldom goes to the gym." As an adjective, it describes a noun. Example: "He makes a seldom appearance at social events."
both
Its both
both
Both!