It can be either, because there is no adverb form (fastly) for speed.
A fast car (adjective)
He drove fast (adverb)
its an adjective :D
Slowly is the adverb form. The word slow can be either an adjective or adverb.
An adverb.
it is obviously an adjective because an adjective describes something and an adverb is an action
It is an adjective. The less-used adverb form is dizzily.
The adjective of strength is strong.The adverb of strength is strongly.
Yes, an adverb can modify an adjective. For instance, you could say "I saw a very fast runner." Very, an adverb, modifies fast, an adjective. Another example is "The shelf is too high" where too (adverb) modifies high (adjective).
The adjective in this sentence is "fast"; "really" acts as an adverb.
Fast can be used as an adjective, a verb, and an adverb. Adjective: That is a fast car. Verb: She fasted for five days to lose weight. Adverb: He drives fast. Fast can also be used as a noun. Example: She went on a five-day fast.
Yes it is. An adjective is a word that describes a noun. For example, I have a fast computer.It can also be an adverb, as in "He runs fast."Another use of the adjective or adverb is to mean tight or tightly (held fast).In a separate usage, fast is a verb (to not eat, to abstain).
No. Unlike fast and slow, speedy is always an adjective. The adverb is speedily.
The word "fast" can be an adjective (speedy) or an adverb (speedily). Other adverbs that mean fast are quickly, rapidly, and expeditiously.
No. A modifier that follows a state of being (linking) verb is an adjective. The car is fast. (adjective) The car drove very fast. (adverb)
An adjective describes a noun... ex. The Big ant bit me. Big is the adjective. An adverb describes a verb... ex. I was running fast. fast is the adverb
Fast can be both an adjective and an adverb for "moving fast" (rapid, rapidly), and for "held fast" (secure, securely). The car drove fast. (adverb) The line must be tied fast to the pier. (adverb) * The form fastly, when used, refers to this second meaning.
There is no adjective in that sentence. The word "fast" is sometimes used as an adjective, but in this sentence it modifies the verb "run," so "fast" is an adverb.
Yes,it is an adverb, but it has nothing to do with speed. Fastly means securely, as in made fast (tightly attached or anchored). The adjective fast (quick) is also an adverb (quickly).
Yes it can be, and it can also be an adjective, and an unrelated noun and verb (homonyms). adverb = They drove too fast. adjective = That horse is fast! The line was tied fast to the pier. noun = We are going to have a one-day fast tomorrow. verb = we will fast today until 6 PM.