perfect progressive

noun Grammar. (in English)
  1. a verb form including the auxiliary have followed by been and a present participle, noting the continuation of an activity or event, its incompleteness or interruption, and its connection to the temporal point of reference, as in I've been waiting for over an hour, They had been talking about her before she came into the room, or In July, he will have been living here for two years.
Also called perfect continuous.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018