No, it is not a preposition. Thirty is a number, used as an adjective, noun, and pronoun.
The word "wait" is never an adverb or preposition. It could be used as an interjection ("Wait!"), but in normal use, "wait" is a verb or noun.
Stairs is a noun. "Sharon had to walk (verb) up thirty seven flights of stairs (noun)."
No, then is not a preposition. It is a conjuction.Than is a preposition.
flew is not a preposition. sorry but through is a preposition
No, then is not a preposition. It is a conjuction.Than is a preposition.
its a preposition
no it is not a preposition
no it is not a preposition
At is a preposition. Anything that can be ___ the box is a preposition. For Example: At the box.
If is not a preposition. It is a conjunction.
No, a preposition is always part of a prepositional phrase. The preposition is the word that introduces the phrase and is followed by the object of the preposition.
The preposition, the object of the preposition, and everything in between. The object of the preposition answers the question "(preposition) what?" For example: He looked in the box worriedly. "in the box" is the prepositional phrase because "in" is the preposition, and "box" is the object of the preposition. "Box" answers the question, "(preposition) what?, or in this case, "In what?"