Rephrase the sentence in passive voice in present perfect continuous ...

[ Passive Modals in Different Tenses ]

Rephrase the sentence in passive voice in present perfect continuous tense: He has been studying for hours.

A. Studying has been being done by him for hours.

B. He has been studying for hours by him.

C. For hours, he has been studying.

D. He has been studying for hours since.

Select your answer:

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