Convert the sentence passive voice structure to an active voice structure: The agreement was found to have been violated despite multiple warnings.

Explanation:

📌 Given Passive Sentence:

“The agreement was found to have been violated despite multiple warnings.”

🧠 Understanding the structure:

• was found → Passive (Past Simple)
• to have been violated → Perfect passive infinitive

👉 Meaning:
Someone (unspecified) discovered that the agreement was being violated over time.

🔄 Converting to Active:

We need:

• A subject (doer) → Authorities / Investigators
• Active verb → found
• Correct tense sense → ongoing/repeated violation

✔️ Best Active Form:

“Authorities found that the agreement was being violated.”

❌ Why other options are wrong?

1. It was found that someone violated the agreement. ❌
   → Still mostly passive + changes nuance
2. Authorities found the agreement had been violated. ❌
   → Past Perfect (completed action), but original suggests ongoing violation
3. It had been found that the agreement was violated. ❌
   → Still passive + incorrect tense shift

💡 Key Concept:

⚡ Quick Tip:

👉 When you see:
“was found to have been + V3”
➡️ Convert to:
“subject + found that + was being + V3”

Correct answer:

👉 Authorities found that the agreement was being violated.