Identify the functions of noun in each sentence. Write S for subject, DO for direct object, IO for indirect object, PN for predicate nominative, OP for object of the preposition, OC for objective complement, and APP for appositive. Identify the functions of noun in each sentence. Write S for subject, DO for direct object, IO for indirect object, PN for predicate nominative, OP for object of the preposition, OC for objective complement, and APP for appositive.Identify the functions of noun in each sentence. Write S for subject, DO for direct object, IO for indirect object, PN for predicate nominative, OP for object of the preposition, OC for objective complement, and APP for appositive.