Understanding Active and Passive Voice Transformation

Voice in grammar tells us whether the subject of a sentence performs the action (active voice) or is acted upon (passive voice). The given sentence, "Someone has drunk all the wine in the glass," is in the active voice because the subject, "Someone," is performing the action, "has drunk." We need to transform this into the passive voice.

Converting Present Perfect Active to Passive Voice

The original sentence is in the Present Perfect tense. The structure of the Present Perfect active voice is:

Subject + has/have + Past Participle + Object

The structure of the Present Perfect passive voice is:

New Subject (old object) + has/have + been + Past Participle (+ by + Old Subject)

Let's break down the given sentence:

• Subject: Someone
• Verb: has drunk (Present Perfect)
• Object: all the wine in the glass

To convert this to passive voice, we follow these steps:

1. Identify the object of the active sentence: "all the wine in the glass". This becomes the subject of the passive sentence.
2. Identify the tense: Present Perfect. The passive structure uses "has/have + been + Past Participle".
3. Determine the correct form of "has/have" for the new subject. "All the wine" is treated as singular because "wine" is an uncountable noun, so we use "has".
4. Use the past participle of the main verb ("drunk").
5. Include the original subject ("someone") as the agent using "by someone" if it is important or unknown (as in this case).

Applying these steps:

• New Subject: All the wine in the glass
• Passive Verb Phrase: has been drunk
• Agent: by someone

Putting it together, the passive voice sentence is: "All the wine in the glass has been drunk by someone."

Analyzing the Given Options

Let's look at the provided options and see which one correctly follows the rules for transforming the Present Perfect active voice sentence into the passive voice.

Option 1: All the wine in the glass had being drunk.

• This option uses "had being drunk," which is not a correct passive voice construction in English. The tense is also incorrect; "had been drunk" would be Past Perfect passive.

Option 2: All the wine in the glass has been drunk by someone.

• This option uses "has been drunk," which is the correct passive structure for the Present Perfect tense with the new subject "All the wine." It also correctly includes the agent "by someone." This matches our derived passive sentence.

Option 3: All the wine in the glass had been drunk.

• This option uses "had been drunk," which is the passive voice for the Past Perfect tense, not the Present Perfect tense of the original sentence.

Option 4: All the wine in the glass has drunk.

• This option uses "has drunk," which is still in the active voice. It implies the wine is doing the action of drinking, which does not make grammatical sense and is not the passive transformation.

Based on the analysis, Option 2 is the only one that correctly converts the given active voice sentence in the Present Perfect tense to the passive voice.

Revision Table: Active vs. Passive Voice (Present Perfect)

Additional Information on Passive Voice

The passive voice is often used when the action is more important than the doer of the action, or when the doer is unknown, unimportant, or obvious from the context. In the example sentence, "Someone" is an indefinite pronoun, indicating an unknown person. Including "by someone" in the passive voice is grammatically correct but is often omitted when the agent is unknown or unimportant.

For example, the sentence could also be correctly written in passive voice as "All the wine in the glass has been drunk." However, since Option 2 includes "by someone" and correctly follows the structure, it is a valid and explicitly stated passive form based on the original active sentence.