Active to Passive Voice Conversion

The question asks to convert a sentence from active voice to passive voice. The original sentence is a future simple tense question:

Active Voice: Where will they hold the conference?

Understanding Voice Change

Voice change involves shifting the focus from the doer of the action (subject in active voice) to the receiver of the action (object in active voice).

• Active Voice Structure (Future Simple Question): Question Word + Auxiliary Verb + Subject + Main Verb + Object?
• Passive Voice Structure (Future Simple Question): Question Word + Auxiliary Verb + Object (becomes Subject) + $be$ + Past Participle + ($by$ + Agent)?

Applying the Transformation

Let's break down the active sentence:

• Question Word: $Where$
• Auxiliary Verb: $will$
• Subject: $they$
• Main Verb: $hold$
• Object: $the conference$

Now, let's construct the passive voice sentence:

1. Start with the question word: $Where$
2. Add the auxiliary verb: $will$
3. Use the active object as the new subject: $the conference$
4. Add the auxiliary verb $be$
5. Add the past participle of the main verb ($hold$ becomes $held$): $held$
6. The agent ($by them$) is usually omitted in passive questions when the agent is indefinite or unknown.

Combining these elements gives the passive voice structure:

Passive Voice: Where will the conference be held?

Analyzing Options

Let's compare this result with the given options:

• Option 1: $Where the conference will be held?$ - Incorrect structure; missing $will$ before the subject.
• Option 2: $Where will the conference be held?$ - Correct structure and tense match.
• Option 3: $Where is the conference held?$ - Incorrect tense (Present Simple Passive).
• Option 4: $Where has the conference been held?$ - Incorrect tense (Present Perfect Passive).

Therefore, the correct passive transformation is Option 2.