Active-to-passive voice (simple past): Convert the sentence to the correct passive while preserving tense and agent. Source sentence: James Watt discovered the energy of steam. Instruction: Choose the grammatically correct passive-voice option.
Verbal Ability
Change of Voice
Difficulty: Easy
Choose an option
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AThe energy of steam discovered James Watt.
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BThe energy of steam was discovered by James Watt.
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CJames Watt was discovered by the energy of steam.
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DJames Watt had discovered energy by the steam.
Answer
Correct Answer: The energy of steam was discovered by James Watt.
Explanation
Given data
- Tense: simple past.
- Active: James Watt discovered the energy of steam.
Concept / ApproachPassive in simple past: was/were + past participle.
Step-by-step transformationObject → subject: the energy of steam → The energy of steamAuxiliary: wasPast participle: discoveredAgent: by James WattFinal passive: The energy of steam was discovered by James Watt.
Eliminate wrong optionsA: Misordered active-like structure; ungrammatical meaning. ❌B: Correct passive in simple past. ✅C: Nonsensical reversal of roles. ❌D: Changes tense and adds by the steam; incorrect. ❌
Final AnswerThe energy of steam was discovered by James Watt.