It is an adverb. It cannot be a preposition.
It may be considered a noun in some uses.
On can be an adverb a preposition or an adjective. adverb - Turn the lights on. adjective - The switch is in the on position. preposition - I'll see you on Sunday.
No. Almost is an adverb. It is not used as a preposition.
It can be either. If it takes a noun as an object, it is a preposition. It if stands alone or with other adverbs, it is an adverb. It can, rarely, be an adjective.
It can be either. If it has a noun as its object, it is a preposition. Standing alone, it is an adverb (and possibly an adjective). It can also be a conjunction.
It is a preposition. It cannot stand alone to modify a verb.
Here is usually an adverb, but can also be a noun, an adjective, and an interjection. It is not a preposition.
No, hither is an adverb, meaning to or towards this place.
Yes. It answers the question "where." (it can be a noun when the object of a preposition)
The word here is an adverb. For example in the sentence "Come here" come is a verb, and it is modified by here. (This is actually a sentence with a substantial implied section; it means I want you to come here.)
There are no adverbs in this sentence. Mom = noun is = auxiliary verb waiting = gerund outside = preposition adverb for = preposition them = object pronoun. "outside" can be used as a preposition, but here it's an adverb
Here is preposition used in a sentence. Adverb phrases use a preposition to tell what, when and how an action can occur.
No, it is not a preposition. Tall is an adjective and possibly an adverb.
I'm about 90% certain it is an adverb. About can serve as an adverb, preposition or adjective. I'm 99.9999999999999% certain it isn't an adjective as used here, but preposition or adverb depends on whether there is anything more to the sentence: He wandered about (aimlessly) => about is an adverb He wandered about the park => about is a preposition
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.