3. A phrase used as an adjective is called an adjective phrase.

4. A phrase used as an adverb is called an adverbial phrase.

In the examples in [§ 40], The Father of Waters is a noun-phrase; with blue eyes, an adjective phrase; at the window, an adverbial phrase; are looking, a verb-phrase.

42. Many adjective and adverbial phrases consist of a preposition and its object, with or without other words.

Adjective or adverbial phrases consisting of a preposition and its object, with or without other words, may be called prepositional phrases.

CLAUSES—COMPOUND AND COMPLEX SENTENCES

43. Phrases must be carefully distinguished from clauses. The difference is that a clause contains a subject and a predicate and a phrase does not.

44. A clause is a group of words that forms part of a sentence and that contains a subject and a predicate.