The most important phrase types, in that they are the typical constituents at the heart of a sentence, are the noun phrase (NP) and the verb phrase (VP). In this chapter, we will explore the structure of phrases headed by other parts of speech. Of these, prepositional phrases present the most challenges, and we will spend the most time on them. We will also look briefly at the structure of adjective phrases, adverb phrases, and determiner phrases.