A sentence fragment involves subordinate clauses and phrases that do not express a complet thought. Besides, <u>a noun phrase refers to a group of words headed by a noun or pronoun which function as a noun</u>. As a consequence, the phrase <em>a huge package in the store</em> can function as a subject, object or complement.
On the other hand, a verb phrase is part of a predicate and includes a verb as well as complements and modifiers.