past perfect continuous passive
Because there is no past perfect continuous passive in the English Grammar Profile, we can say it is C2. A search in NOW corpus shows that this grammar is extremely rare. 1 HAD BEEN BEING TREATED 10 The woman had left the Ulster Hospital, Dundonald, where she had been being treated. belfastlive.co.uk 2 HAD BEEN BEING ABUSED 7 3 ‘D BEEN BEING ABUSED 7 4 HAD …