Question

perfect continuous active voice and passive voice structure

Answer 1

See the chart.
hope it helps you.
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Answer 2

HEY DEAR YOUR ANSWER IS HERE
_________
________--There are two basic rules for converting sentences from Active Voice into Passive Voice, which are common for all tenses. The places of subject and object will be interchanged in the sentence. Only 3rd form of the verb or Past Participle (e.g. written) will be used as a main verb in Passive Voice.
In perfect continuous we can't change active into passive it is a rule...