In this case, "have been" is a verb phrase, made up of:
* Have: A helping verb (also called an auxiliary verb)
* Been: The past participle of the verb "to be"
The verb phrase "have been" is used to form the present perfect tense, which describes an action that started in the past and continues into the present, or an action that happened in the past and has an effect on the present.
Example:
* I have been studying for this test all week. (The action of studying began in the past and is ongoing.)
* She has been to Paris twice. (The action of visiting Paris happened in the past and has an effect on the present: She has experience with Paris.)