Question

have been convert into passive voivce​

Answer 1

Answer:

To make a past passive form we use was/were + past participle of the verb. ... To make a passive form of the perfect tense we use have/has/had + been + past participle of the verb.

Explanation:

Answer 2

have been is a verbal phrase and the verb is be .

It's an intransitive verb which cannot be passive.