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Module: | Basic Tense Transformations

Q27: Consider the following statements regarding sentence transformations:

1. The active sentence "The manager might have approved the request" converts to the passive voice as "The request might have been approved by the manager."
2. The active sentence "The storm has destroyed twelve houses" converts to the passive voice as "Twelve houses had been destroyed by the storm."
3. The active sentence "An electrical fault could have caused the fire" converts to the passive voice as "The fire could have been caused by an electrical fault."

Which of the above statements is/are correct?
A
Only 1 and 2
B
Only 2 and 3
C
Only 1 and 3
D
All 1, 2, and 3
✅ Correct Answer: C
🎯 Quick Answer:
Statements 1 and 3 correctly handle perfect modals. Statement 2 makes an unwarranted tense shift.
Concept Definition: These statements test perfect modal verbs (might have, could have) alongside standard perfect tenses.
Structural Breakdown: Active perfect modals take the form "Modal + have + V3". Their passive equivalents must be "Modal + have + been + V3". Statements 1 and 3 successfully apply this.
Historical/Related Context: Perfect modals frequently trap candidates who mistakenly attempt to change "have" to "has" based on the new subject, or those who confuse voice rules with narration rules (where tenses shift backward). Causal Reasoning: Statement 2 is incorrect because it converts a Present Perfect active sentence ("has destroyed") into a Past Perfect passive sentence ("had been destroyed"). In voice transformation, the original tense must be strictly maintained.
The correct passive is "Twelve houses have been destroyed by the storm."