1) The document defines a phrase as a group of words that does not contain a subject or verb. It provides examples of phrases. 2) Phrases are analyzed using Universal Grammar and native speaker intuitions. This results in a theory of grammar that includes words, phrases, and categories like nouns and verbs. 3) Phrase structure rules determine what elements can go into a phrase and their order. Phrases are formed by heads like nouns or verbs combined with other constituents.