Change the following sentence into Passive Voice.

The enemy has defeated our army.

Our army has been defeated

The correct answer is Option (1) - Our army has been defeated

Explanation:

When converting from Active Voice to Passive Voice:

Active Voice: The enemy has defeated our army.
Structure: Subject + has/have + past participle + object

Passive Voice: Object + has/have + been + past participle + by + subject
→ Our army has been defeated (by the enemy).

Why others are incorrect:

• Option 2: Our army had been defeated →  Wrong tense (past perfect instead of present perfect).

• Option 3: Our army have been defeated →  Subject “army” is singular; it takes has, not have.

• Option 4: Our army was defeated →  Simple past tense, not present perfect.

 Therefore, the correct passive form is “Our army has been defeated.”