Prepositional phrases in English grammar are phrases in which a preposition functions as the head of the phrase. A prepositional phrase consists of a preposition followed by a prepositional complement.
Prepositional phrase is a grammatical form.
The twelve grammatical functions performed by prepositional phrases are noun phrase modifier, noun phrase complement, adjective phrase complement, verb phrase complement, adjunct adverbial, disjunct adverbial, subject, subject complement, direct object, object complement, indirect object, and prepositional complement.
The four grammatical forms that may appear in noun phrases are noun phrases, noun clauses, verb phrases, and prepositional phrases.
Brinton, Laurel J. & Donna M. Brinton. 2010. The linguistic structure of Modern English, 2nd edn. Amsterdam: John Benjamins Publishing Company.
Hopper, Paul J. 1999. A short course in grammar. New York: W. W. Norton & Company.
Huddleston, Rodney. 1984. Introduction to the grammar of English. Cambridge: Cambridge University Press.