Past Perfect Tense
Active থেকে Passive করার নিয়ম:
● অবজেক্টকে সামনে আনো
● tense অনুযায়ী “had been” বসাও
● মূল verb-এর 3rd form (Past participle) বসাও
● প্রয়োজনে “by + subject” যোগ করো
Structure (Passive):
Object + had been + past participle (V3) + (by + subject)
Passive: A letter had been written by him.
Active: He had written a letter.