Change voice Our army has defeated the enemy
Change voice Our army has defeated the enemy
A: The enemy has defeated by our army
B: The enemy had been defeated by the army
C: The enemy has been defeated by our army
D: None of these
The sentence in passive voice becomes The enemy has been defeated by our army. This keeps the tense in present perfect form. Option A is grammatically incorrect and option B changes the tense. Passive voice changes focus from subject to object. It is important in English grammar for writing and exams.