- The company is being taxed
- The company has been taxed
- The company has been being taxed
These are three examples listed in a book on syntax.
In the first one, the book suggests that "is" is the progressive auxiliary and "being" is the passive auxiliary.
In the second one, the book suggests that "has" is perfective and "been" is passive.
In the third example, the book suggests that "has" is the perfective, "been" is the progressive and "being" is the passive.
Firstly, I was wondering how does one define what the passive auxiliary actually is? I understand how one forms the passive tense, but I'm unsure what a passive auxiliary actually is.
Secondly, It seems odd to me that in the third example, "been" is noted as the progressive auxiliary, whereas in the second example the word "been" is defined as being the passive auxiliary.
If anyone could clear these issues up for me I would be extremely grateful.