disapprovingly
No, "frowned" is not an adverb; it is the past tense of the verb "frown." Adverbs typically modify verbs, adjectives, or other adverbs, whereas "frowned" describes an action. For example, you might say, "She frowned sadly," where "sadly" is the adverb modifying how she frowns.
The job of an adverb is to describe verbs
you can't but you can describe an adjective with an adverb.
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
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, it is not an adverb. Dusty is an adjective, and the adverb form is "dustily."
yes