點將have/had been doing轉成被動式?

Perfect continuous tenses are exceedingly rarely used in passive, so that your two sentences are not normally put into passive. ( passive form 可以說無, 傳統的 grammar 書未見過)

I have been reading the book. (Present perfect continuous tense - active voice)
I had been reading the book. (Past perfect continuous tense - active voice)

In fact, we avoid using passive of the perfect continuous tenses. We prefer to use an active form and an impersonal subject e.g. they/one.

Example:
By next month the murder will have been being investigated for over a year. ~ wrong

By next month they will have been investigating the murder for over a year. ~ correct


I have read the book. ~ present perfect (active voice)
The book has been read by me. ~ present perfect (passive voice)

I had read the book. ~ past perfect (active voice)
The book had been read by me. ~ past perfect (passive voice)

^Incorrect.

The book has been read by me.
The book had been read by me.

The book is reading by me.
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