frequency and examples of this English Grammar
It is not surprising that English Grammar Profile lists no examples of this rare grammar since not only do students not use it, but native speakers have little reason to use it either. Here are the top 5 examples from the 14 billion word iWeb corpus:
1 HAVE BEEN BEING USED 24
2 HAVE BEEN BEING MADE 15
3 HAVE BEEN BEING TREATED 13
4 HAVE BEEN BEING PAID 7
5 HAVE BEEN BEING BUILT 6
1 HAS BEEN BEING USED 24
2 HAS BEEN BEING WORKED 8
3 HAS BEEN BEING DONE 7
4 HAS BEEN BEING PLAYED 5
5 HAS BEEN BEING GROOMED 5
Note that is less than 100 examples = RARE!
... Investigations boss Martin Mbaya said police seized 35 mobile phones suspected to have been being used in exam cheating at the school.
... especially when nationalism and national security have been being used as major poll planks by the ruling Bharatiya Janata Party (BJP).