Here's why:
* Verb: The main verb is "been," which is the past participle of "be."
* Auxiliary Verb: "Has" is an auxiliary verb (also called a helping verb) that works with the past participle "been" to create a complete verb phrase.
Together, "has been" acts as a single unit to express a state of being in the present perfect tense.
Example:
* "She has been to the store."