Prepositional Phrase As Adjective. Afraid of she's afraid of the dark. The prepositional phrase at the park acts adjectivally because it’s providing more information about the puppy.

Like adjectives, they tell which one, what kind, how much, or how many. A prepositional phrase (= a preposition and the noun following it, for example at night or after breakfast) topics language b1. When a prepositional phrase acts upon a noun, we say it is behaving adjectivally because adjectives modify nouns.