It can be either.
It is an adjective when it precedes a noun (back fence) or when it follows a linking verb (he is back).
It is an adverb when it answers the question "where" (reached back, jumped back).
It can also be a noun (the back of something or someone).
Dark can be an adjective or a noun. Darkly is an adverb.
Night: noun an: adverb adjective: adjective noun: noun adverb: adverb
It depends on how you use it. For example in "I'm going to back the car up" it's a verb. In other uses it can be a noun, adjective or adverb.
Adverb.Here is an adverb, not an adjective.
its an adverb an adjective is a descriptive word an adverb is a feeling
An adverb describes a verb, an adjective or another adverb.
The adjective of strength is strong.The adverb of strength is strongly.
It can be an adjective OR an adverb. adjective -- You dog is a friendly dog adverb -- She always talks friendly to me
Nervous is an adjective. The adverb form is nervously.
adverb. it doesn't modify a noun or a pronoun
Very can be an adjective, or an adverb.It is an adverb in "She did it very quickly" It is an adjective in "At the very back of the shop"
No, it is an adverb. It is the adverb form of the adjective perfect.