Change the following sentence from Active Voice to Passive Voice. They will…

Rule: In the simple future passive, use will + be + past participle.

• Step 1: Make the object "the fireworks" the subject of the sentence.

• Step 2: Use the simple future passive form: "will + be + past participle" → "will be started."

• Step 3: Keep the time expression "after midnight" in the sentence without changing its meaning.

• Step 4: If you want to mention the original subject, add it as the agent with "by + them."

Final passive sentence: The fireworks will be started by them after midnight.

Style note: This passive form is grammatically correct but somewhat formal. You can omit the agent if it is unnecessary: "The fireworks will be started after midnight." Often the active voice is preferred for simplicity: "They will start the fireworks after midnight."

Why other forms are less suitable:

• "The fireworks are going to be started..." changes the aspect to a near-future construction and sounds awkward in this passive sentence.

• "After midnight the fireworks will be started." omits the agent (which is acceptable) but is less natural than putting the subject first: "The fireworks will be started after midnight."

• Phrases like "Starting of the fireworks will be done..." are wordy and awkward; avoid unnecessary nominalization and extra "be done."