Some examples of prepositions include "about," "below," "inside," "to" and "with." A preposition shows the relationship between a noun and a pronoun or other word. They are found at the beginning of a prepositional phrase.
Ordinarily, prepositions are found before the noun or pronoun they modify. A prepositional phrase describes the clause that contains the preposition at the beginning, such as "up the hill" or "near the table."
Confusing a preposition with a similar verb ranks as one of the most common grammatical mistakes involving prepositions. For instance, "past" is a preposition, while "passed" is a verb. Similarly, "except" is a preposition, while "accept" is a verb.