An adjective phrase (or adjectival phrase) is a phrase whose head is an adjective. Almost any grammar or syntax textbook or dictionary of linguistics terminology defines the adjective phrase in a similar way, e.g. Kesner Bland (1996:499), Crystal (1996:9), Greenbaum (1996:288ff.), Haegeman and Guéron (1999:70f.), Brinton (2000:172f.), Jurafsky and Martin (2000:362). The adjective can initiate the phrase (e.g. fond of steak), conclude the phrase (e.g. very happy), or appear in a medial position (e.g. quite upset about it). The dependents of the head adjective—i.e. the other words and phrases inside the adjective phrase—are typically adverb or prepositional phrases, but they can also be clauses (e.g. louder than you are). Adjectives and adjective phrases function in two basic ways, attributively or predicatively. An attributive adjective (phrase) precedes the noun of a noun phrase (e.g. a very happy man). A predicative adjective (phrase) follows a linking verb and serves to describe the preceding subject, e.g. The man is very happy. Attributive vs. predicative The adjective phrases are underlined in the following example sentences. The head adjective in each of these phrases is in bold, and how the adjective phrase is functioning—attributively or predicatively—is stated to the right of each example: The distinguishing characteristic of an attributive adjective phrase is that it appears inside the noun phrase that it modifies. An interesting trait of these phrases in English is that an attributive adjective alone generally precedes the noun, e.g. a proud man, whereas a head-initial or head-medial adjective phrase follows its noun, e.g. a man proud of his children. A predicative adjective (phrase), in contrast, appears outside of the noun phrase that it describes, usually after a linking verb, e.g. The man is proud of his children. Adjective vs. adjectival There is a tendency to call a phrase an adjectival phrase when that phrase is functioning like an adjective phrase, but is not actually headed by an adjective. For example, in Mr Clinton is a man of wealth, the prepositional phrase of wealth modifies a man in a manner similar to how an adjective phrase would, and it can be reworded with an adjective, e.g. Mr Clinton is a wealthy man. A more accurate term for such cases is phrasal attributive or attributive phrase. Constituency tests Constituency tests can also be used to identify adjectives and adjective phrases. Here are the three constituency tests, according to X-bar theory, that prove the adjective phrase