Select the option that expresses the given sentence in passive voice.
I have published many research papers.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., Many research papers have been published by me.
Voice Concept: Active to Passive transformation
Grammar Explanation: The active sentence is in the present perfect tense (“have published”). In passive voice, the structure becomes have been + past participle to match the tense. The subject “I” becomes the agent “by me,” and “many research papers” becomes the new subject.
Correction: I have published many research papers → Many research papers have been published by me.
Final Sentence: Many research papers have been published by me.
Conclusion: The correct option is Many research papers have been published by me.