Yes, it can. You can say "he ran down the road" but if you add slowly, "he slowly ran down the road", the picture you see is not the same.
An adverb can modify or describe a verb.
Yes, an adverb modifies a verb.
Adverb phrases modify the verb, adjective, or adverb of the sentence.
An adverb modifies the meaning of a verb or another adverb. An example of modifying a verb is, "quickly jumped." Quickly modifies the verb, jumped. If you say, "very quickly jumped," you are using very to modify the adverb quickly.
You could modify a phrasal verb (more than one word), or modify an entire clause with an adverb such as "fortunately."
No. It is a verb.
Alone is not an adverb. An adverb modifies a verb. Alone does not modify a verb (is not an adverb).
To modify a 'verb' the clue is in the name of the qualifying word , viz. 'AD**VERB**'.
noun, verb, or another adverb
An adverb is a word that modifies a verb.
The month May is not The adverb may is
An adverb modifies a verb. An adjective modifies a noun.