What is the role of a preposition in a sentence?

The role of a preposition in a sentence is to connect its noun or pronoun to another word, often establishing a relationship of location, direction, time, or manner. Prepositions form phrases, which can add detail to sentences by providing context. For example, in the phrase “on the table,” the preposition “on” shows the relationship between the noun "table" and wherever the action is taking place.

While some options may seem plausible, they do not capture the primary function of prepositions. Describing a noun pertains to adjectives, and expressing an emotion relates to interjections or specific verbs. The function of a verb is distinct from that of a preposition, as verbs indicate actions or states of being. Understanding the clear connection that prepositions create between components of a sentence is essential for grasping their grammatical significance.