(Auxiliary)● Preposition?Prepositional Phrases● Adverb● Adjective?Adjectival Phrases● clause=sentence ... tructure to the corresponding APs.5.4Prepositional Phrase5.5Cross-categorialstructuralsymmetryThese seem ... lacking an overt Complementiser also have the status of S-bar (with an empty C)ⅲ) Main Clauses c