Here's why:
* Present Perfect Tense: This tense describes an action that started in the past and continues into the present or has a lasting effect on the present.
* "Has" as Auxiliary Verb: The word "has" is an auxiliary verb (helping verb) that is used to form the present perfect tense with the third-person singular subject (he, she, it).
* "Been" as Past Participle: The word "been" is the past participle of the verb "to be." It's used in combination with "has" to create the present perfect tense.
Example: "She has been living in Paris for five years."
Let me know if you have any other verb questions!