Select the correct passive form of the given sentence. "He had lost the keys before the meeting."
Show answer & explanation
Correct answer: C
Explanation
Conversion from active to passive voice:
Identify the Tense: The original sentence is in the Past Perfect tense ("had lost").
Passive Structure: To convert Past Perfect to passive voice, the formula is: [Subject] + had been + [Past Participle of Verb] + [by Agent].
Breakdown:
The object "the keys" becomes the new subject.
The auxiliary "had" stays the same, and "been" is added.
The past participle "lost" remains.
The original subject "He" becomes the agent "by him".
The time phrase "before the meeting" remains at the end.
Passive voice: The keys had been lost by him before the meeting.