A phrase is a group of words that does not contain both a subject and a verb. There are three main types of phrases: a noun phrase, which contains a noun, a verb phrase containing at least one verb, and an adjective or adverb phrase. Noun phrases and verb phrases are the building blocks of sentences, with examples given such as "The man captured the bird" containing a noun phrase and verb phrase, and "Ali ate an apple" with a verb phrase and another noun phrase.