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).
It is never an adverb. It is always a preposition. The word "within" can be an adverb or a preposition, and the word "forthwith" (immediately) is an adverb.
No, it is not a preposition. The word exactly is an adverb.
The word with is not an adverb; it is a preposition. The word "without" may be an adverb (e.g. to do without, where no specific object is used).
No, of is not an adverb. The word of is exclusively a preposition, but sometimes is separated from its object (e.g. what is that bolt a part of?).
No, it is not a preposition. "Away" is an adverb or an adjective.
No, it is not a preposition. Tall is an adjective and possibly an adverb.
It is never an adverb. It is always a preposition. The word "within" can be an adverb or a preposition, and the word "forthwith" (immediately) is an adverb.
It is never an adverb. It is always a preposition. The word "within" can be an adverb or a preposition, and the word "forthwith" (immediately) is an adverb.
preposition
Adverb: I had a hat on. Preposition: I didn't have any money on me.
In this adverb form of "with" meaning "accompanying," along is an adverb and with is a preposition.
Yes "throughout" is a preposition.Yes, it can be a preposition. But it can also be an adverb by itself.
No, it is not a preposition. It is an adverb.
No. It is not a preposition. Twice is an adverb.
No, it is not a preposition. Usually is an adverb.
No, it is not a preposition. Usually is an adverb.
No, it is not a preposition. The word some is a pronoun, adjective, or adverb.