Explanation

Active Voice (Future Continuous):

Structure: Subject + will be + present participle (V-ing) + object

Example: "Ahsan will be playing cricket."

Passive Voice (Future Continuous):

Structure: Object + will be being + past participle (V3) + by + subject

Example: "Cricket will be being played by Ahsan."

Explanation

Change the voice: "Did he buy mangoes?" Were mangoes bought by him

The sentence is in past simple tense (Did + base verb).

Passive voice becomes: Were + past participle (bought) + by + subject.

Explanation

The matter has been discussed with her teacher by her.

Rules of Voice Change (Present Perfect Tense):

Active: Subject (She) + has/have + past participle (discussed) + object (the matter).

Passive: Object (The matter) + has/have been + past participle (discussed) + by + subject (her).

Explanation

The sentence is in past simple tense (did discourage) — passive form becomes was/were + past participle.

So, correct passive structure: "Why were they discouraged by you?"

Explanation

The given sentence is in past perfect passive voice: "had been bribed."

Active voice of past perfect: Subject + had + past participle, hence "They had bribed the officer."

Explanation

Why has the mirror been broken by you?

This is a present perfect interrogative sentence in passive voice.

Structure: Why + has/have + object + been + past participle + by subject.

Explanation

All the broken bridges are being repaired by the Engineers.

"Are repairing" is present continuous tense → passive becomes "are being repaired".

Subject (The Engineers) becomes agent at the end: "by the Engineers".

Explanation

Nobody has touched this box.

Passive voice: This box has never been touched by anybody.

"Nobody" becomes "by anybody" in passive.

Present perfect tense is maintained: has been touched.

Explanation

Use the correct form of the verb "be" according to the modal ("must be").

Use the past participle of the main verb ("help" → "helped").

 Add the agent (the doer of the action) at the end if needed ("by you").

So,  

Active: You must help me.  

Passive: I must be helped by you

Explanation

Correct Passive Voice Conversion:

The original sentence ("Have you finished your job?") is in the active voice (Present Perfect Tense).

Its passive form follows the structure: "Has/Have + subject + been + past participle + by + agent?"

Thus, it becomes: "Has your job been finished by you?"