the phrase 'have been' is a verb phrase made up of the present perfect verb 'have' and the past participle verb 'been.'
it is used to describe actions that have been completed in past times at or before the present in the context of temporal situations. This verb phrase indicates that a certain action has been performed by the subject, but does not emphasize the period of time when the action was completed.
I have been to the store.
They have been friends for many years.
when using this phrase, pay attention to the verb tense of the sentence and ensure that 'have been' is accompanied by an appropriate verb to form a complete thought.