When about is used by itself, not with an object, it is an adverb.
Examples:
The people strolled about. (to and fro)
The distance is about five miles. (approximately)
No the word every is not a preposition.
Yes, the word among is a preposition.
The word toward is a preposition. It means moving in the direction of something. (e.g. toward the window)
It is almost always used as a preposition.
The word "during" is a preposition.
The preposition is up.
No the word every is not a preposition.
No, the word "when" is not a preposition. It is an adverb or a conjunction used to indicate time or a condition.
Yes, the word among is a preposition.
No, it is not a preposition. The word explore is a verb.
No, it is not a preposition. The word thing is a noun.
The word " I " is not a preposition, it is a pronoun.
No, it is not a preposition. The word away is an adverb.
No, the word "early" is an adverb, not a preposition. It is used to describe the timing of an action or event.
No, it is not a preposition. The word surrounds is a verb form.
No, it is not a preposition. The word travelers is a plural noun.
No, it is not a preposition. The word rivers is a plural noun.