Been As The Past Participle Of Come And Go

• Have you ever been to Cairo? (= Have you ever visited Cairo?)
• I have been to see my uncle. (= I have paid a visit to my uncle.)
• Has the postman been yet? (= Has the postman called yet?)

Note that been is used for completed visits.

Compare:

• The postman has already been. (= He has come and gone again.)
• Where is John? He has gone to Cairo. (= He is in Cairo at the moment.)