Why does the following -

1. Present perfect continuous tense
2. Past perfect continuous tense
3. Future continuous tense
4. Future perfect continuous tense

cannot be converted in the passive voice?

- The four mentioned tenses: present perfect continuous tense, past perfect continuous tense, future continuous tense, future perfect continuous tense: can be changed into the passive voice.
- The use is quite uncommon, the reason being the excessive use of auxiliaries that makes the sentence sound awkward.
- For example: present perfect continuous in passive voice: A painting has been being made by me.
- As the use is almost non-existent, it is mentioned in some grammar books that the passive voice of these four tenses does not exist.