Understanding Voice Change: Passive to Active

Voice change in English grammar involves transforming a sentence from passive voice to active voice, or vice versa. The core meaning remains the same, but the emphasis shifts. In active voice, the subject performs the action. In passive voice, the subject receives the action, and the performer of the action (agent) is often mentioned using 'by'.

Analyzing the Given Passive Sentence

The given sentence is: "Is that bird seen by you?"

• This is an interrogative sentence (a question).
• It is in the passive voice. We can identify this by the structure: verb "to be" (is) + past participle of the main verb (seen) + 'by' + agent (you).
• The subject in the passive sentence is "that bird".
• The agent (the doer of the action) is "you".
• The tense is Simple Present. The passive structure "is + seen" indicates Simple Present Passive.

Steps to Convert Passive to Active Voice (Interrogative)

To convert a passive interrogative sentence in Simple Present to active voice, follow these steps:

1. Identify the agent in the passive sentence ("by you"). This becomes the subject in the active sentence ("you").
2. Identify the subject in the passive sentence ("that bird"). This becomes the object in the active sentence ("that bird").
3. Determine the tense of the passive sentence (Simple Present). The active sentence must be in the same tense (Simple Present).
4. For Simple Present active interrogative sentences with the subject "you", the structure is "Do + subject + base form of the verb + object?".
5. The main verb is "seen", which is the past participle of "see". The base form of the verb is "see".

Deriving the Active Voice Sentence

Applying the steps:

• Subject (Active): you
• Object (Active): that bird
• Tense: Simple Present
• Verb (Base form): see

Using the Simple Present active interrogative structure for "you": "Do + you + see + that bird?".

The correct active voice sentence should be "Do you see that bird?".

Evaluating the Options

Let's examine each option provided:

Based on the analysis, only the first option correctly transforms the passive Simple Present interrogative sentence "Is that bird seen by you?" into its active Simple Present interrogative form.

Revision Table: Passive vs. Active Voice

Additional Information: Importance of Tense in Voice Change

It is crucial to maintain the original tense when converting a sentence between active and passive voice. Changing the tense fundamentally alters the meaning and timing of the action. For example, converting a Simple Present sentence to Simple Past or Present Continuous during voice change is incorrect. Always identify the tense of the original sentence first and ensure the transformed sentence is in the exact same tense.

Also, pay attention to the type of sentence (declarative, interrogative, imperative) as the structure for voice change varies accordingly.