They have built a perfect dam across the river. (Find the same meaning)
They have built a perfect dam across the river. (Find the same meaning) Correct Answer A perfect dam has been built by them across the river
Present perfect tense যুক্ত বাক্যকে passive করতে হলে structure হবে object কে sub + have/has + verb এর p.p + by + sub কে obj + extension.