[Ask ] What is the tense of this sentence?

[maxqq (max)]

=== It has been a pleasure doing business with you.===

Is this sentence a "Present perfect continuous tense"?
Why not is "Present perfect tense"?

If this is,
Why could use this sentence on this occasion?

Thanks

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※ 編輯: maxqq (114.36.10.185 臺灣), 08/02/2019 16:33:39
※ 編輯: maxqq (114.36.10.185 臺灣), 08/02/2019 16:34:22
推 afterjump: have p.p. +being= present continue perfect tense