Understanding Active and Passive Voice Conversion

This question asks us to convert a sentence from active voice to passive voice. The original sentence is "She has written many books."

What is Active and Passive Voice?

• Active Voice: In active voice, the subject of the sentence performs the action. The structure is typically: Subject + Verb + Object.
  • Example: She (Subject) has written (Verb) many books (Object).
• Passive Voice: In passive voice, the subject of the sentence receives the action. The structure is typically: Object + Be verb + Past Participle (V3) + by + Subject (optional).
  • Example: Many books (Subject/Object in active) have been written (Be verb + V3) by her (by + Subject in active).

Converting Present Perfect Tense to Passive Voice

The original sentence "She has written many books" is in the present perfect tense (Subject + has/have + V3 + Object).

To convert a sentence in the present perfect tense from active to passive voice, we follow this structure:

\(\text{Object} + \text{has/have} + \text{been} + \text{V3 (Past Participle)} + \text{by} + \text{Subject}\)

Step-by-Step Conversion

1. Identify the Subject, Verb, and Object in the Active Sentence:
   • Subject: She
   • Verb: has written (present perfect)
   • Object: many books
2. Move the Object to the Subject Position in the Passive Sentence:
   • The new subject is "Many books".
3. Choose the Correct Form of "has/have":
   • Since the new subject "Many books" is plural, we use "have".
4. Add "been" after "has/have":
   • This is required for the present perfect passive structure.
5. Use the Past Participle (V3) of the Verb:
   • The V3 of "write" is "written".
6. Add "by" followed by the original Subject (in object form):
   • The object form of "She" is "her". So we add "by her".

Combining these steps, the passive voice sentence is: "Many books have been written by her."

Analyzing the Options

Let's look at the given options based on our conversion:

Based on the analysis, Option 4 correctly expresses the original sentence in the passive voice.

Revision Table: Active vs. Passive Voice Structures

Additional Information on Voice in English Grammar

Understanding active and passive voice is important for varying sentence structure and emphasizing different parts of a sentence.

• When to use Passive Voice:
  • When the doer of the action is unknown or unimportant.
  • When you want to emphasize the action itself or the recipient of the action rather than the doer.
  • In scientific or technical writing, to maintain objectivity.
• Agents in Passive Voice: The "by + Subject" part (called the agent) is often omitted in passive sentences if the doer is obvious, unknown, or irrelevant. For example, "Many books have been written."
• Voice in Different Tenses: As shown in the table, the structure of the passive voice changes depending on the tense of the original active sentence. The 'be' verb and the auxiliary verbs (like has/have, had, will, modals) are key to forming the correct passive structure for each tense.