Pretty much anything with 'ly' at the end.
The job of an adverb is to describe verbs
you can't but you can describe an adjective with an adverb.
No. The word "at" is a preposition. Some archaic constructions (go at, have at) omit the object of the preposition.
The adverb is suppose to describe a verb.
An adverb describes a verb, an adjective or another adverb.
no, it's an adjective because it can describe a noun. mysteriously can describe a verb or other adverb, so it's an adverb.
It is "descriptive".
rapidly, slowly, now, later
The adverb is never, which modifies the verb "eat."
An adverb can modify or describe a verb.
No, it can be a noun or a verb but it does not describe an action so it is not an adverb.
No, the word often is an adverb, a word that modifies a verb. Example uses:I often brush my teeth three times a day.We eat together often. (often eat together)