A grouping of words that acts like a single unit inside a sentence but that does not contain both a subject and a verb is called a B. phrase. Phrases do not have subjects or verbs - they are just a couple of words grouped together that are considered a single unit that cannot be separated. For example, "that young boy" is a noun phrase. A clause and a sentence has a verb and a subject. An apostrophe is just a punctuation mark (').
