It can be, when it is a direction. An example is "we went up in a balloon."
It can also be an adjective or preposition (up the tree), and colloquially a noun or verb.
No, it is not an adverb. The word tree is a noun, or verb (to chase up a tree). The adjective is "treed" (active or passive) but there is no adverb form.
She jumped high up into the air. The word "high" is an adverb in the sentence above.
Does is a verb, not an adverb.
No. The words up and upon are prepositions, but upwards is an adverb. It cannot be a preposition.
Adverb
The word 'at' is the adverb. Up is an adverb here. I think.
When up is used as an adverb, it isn't followed by a noun.Dave jumped up. (adverb)Dave walked up the stairs. (preposition)
Yes, the word "up" can be used as an adverb.
the word up used as an adverb
No. It is not an adverb. Maintain is a verb meaning to keep up, or support.
It can be either. It can be a preposition, or it can be an adverb (walking about), or even possibly an adjective (up and about).
Yes, the word nervously is an adverb.
Yesterday is not an adverb it is a noun. You can learn more about adverbs if you look it up in answers.com.
No, it is not an adverb. The word tree is a noun, or verb (to chase up a tree). The adjective is "treed" (active or passive) but there is no adverb form.
It can be either, depending on whether it has an object. "He climbed up the mountain" (preposition, object mountain) "He entered the elevator and went up" (adverb, no object).
Recently is an adverb of time (a temporal adverb, or a temporal referent).
Up can be: a preposition, a verb, a noun, an adverb,an adjective. a verb: They upped the school fees last year a noun: The ups and downs of life can be scary. an adverb: We are going up to Wellington for a holiday an adjective: The anchor is up now!