Convert the sentence provided below from its passive voice structure to an active voice structure:
Rare minerals are known to have been secretly extracted from the site by unauthorized laborers before the probe.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Unauthorized laborers are known to have secretly extracted rare minerals before probe.
Type of sentence: Complex sentence in passive voice.
Tense: Present perfect infinitive (to have been + past participle).
Given voice: Passive voice.
Subject: Rare minerals.
Object: Unauthorized laborers.
Structure for conversion:
- Passive: Subject + are known to have been + V3 + by + agent
- Active: Agent + is/are known to have + V3 + object
Converted sentence:
Unauthorized laborers are known to have secretly extracted rare minerals before probe.
Hence, the chosen option is correct.