The prepositional phrase comprises three vital elements that include a preposition, its object and a word that modifies the object could be an article. The above description is justified by the phrase in the given sentence i.e. 'on the roof' where 'on' is the preposition, 'roof' is the object and 'the' is the modifier. It functions here as an <u>adjective prepositional phrase</u> as it describes the noun 'The Frisbee' and adding to its detail. Thus, the prepositional phrase in the given sentence is 'on the roof' acting as an adjective.
