Change the following from active to passive:
Change the following from active to passive:
The agency had been monitoring dissent groups covertly for months.
Detailed Solution & Logic
Dissent groups had have been monitored covertly by the agency for months.
📌 Explanation:
Active Sentence:
The agency had been monitoring dissent groups covertly for months.
👉 Tense = Past Perfect Continuous
👉 Structure = Subject + had been + V-ing
🔄 Passive Rule:
👉 Past Perfect Continuous (rare in passive) →
Object + had been being + VÂł + by + subject
✔️ Strict form:
Dissent groups had been being monitored… (grammatically correct but awkward)
👉 So, in practical English (and exams), we simplify to:
had been monitored
❌ Why options are wrong:
Dissent groups had covertly monitored the agency. ❌
→ Meaning changed (wrong subject-object)had have been monitored… ❌
→ Grammatically incorrect (“had have” wrong)Covert monitoring had occurred… ❌
→ Changes sentence structure (not proper passive)The dissent groups were under surveillance. ❌
→ Not a true passive transformation
đź’ˇ Extra Facts (Important for Exams):
1. Rare Passive Forms:
👉 Continuous perfect tenses (like this one) are rarely used in passive
2. Exam Strategy:
👉 If exact passive sounds awkward → use closest correct standard form
✔️ Final Tip:
👉 Always check:
Same meaning
Correct tense
Proper structure
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