Can prepositional phrases be adjectives?
Yes, prepositional phrases can act as adjective phrases in a sentence to give more information about a noun or pronoun (e.g., “The student in the back row is falling asleep”).
Prepositional phrases also have other functions, such as adverb phrases (e.g., “I went to the store”) and noun phrases (e.g., “Behind the bookshelf is the best hiding spot”).