A phrase is a group of words without a subject or a predicate or both and does not express a complete thought. Therefore, a phrase can never stand on its own as a complete sentence. Using different kinds of phrases enables a writer or a speaker to create informative and descriptive sentences that vary in structure. Phrases combine words into a larger unit that can function as a sentence element.
The most common kinds of phrases in English are:
(2) Verb phrases
(3) Prepositional phrases
(4) Gerund phrases and
(5) Participial phrases.
All are explained on this site. Check other posts or use the search bar or search by topic to search for these kinds of phrases