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What are the rules in converting an active sentence to a passive or vice verse?

Here's a breakdown of the rules and steps involved in converting between active and passive voice in English sentences:

Understanding Active and Passive Voice

* Active Voice: The subject of the sentence performs the action. Example: "The cat chased the mouse." (The cat is the subject, and it's doing the chasing)

* Passive Voice: The subject of the sentence receives the action. Example: "The mouse was chased by the cat." (The mouse is the subject, but it's not performing the action; it's being acted upon)

Rules for Converting Active to Passive

1. Identify the Subject, Verb, and Object:

* Subject: The one performing the action.

* Verb: The action word.

* Object: The one receiving the action.

2. Make the Object the Subject: The object of the active sentence becomes the subject of the passive sentence.

3. Use the Past Participle of the Verb: The main verb in the passive sentence will be the past participle of the verb in the active sentence.

4. Add the Auxiliary Verb "be": The passive voice will always require the auxiliary verb "be" (in the appropriate tense).

5. Include the Original Subject (Optional): The original subject of the active sentence is often included in the passive sentence as the object of the preposition "by".

Example:

* Active: The dog ate the bone.

* Passive: The bone was eaten by the dog.

Rules for Converting Passive to Active

1. Identify the Subject and the Object:

* Subject: The one receiving the action (often preceded by "by").

* Object: The one performing the action (often hidden or implied).

2. Make the Object the Subject: The object of the passive sentence becomes the subject of the active sentence.

3. Use the Active Form of the Verb: The past participle in the passive voice is replaced by the active form of the verb.

4. Remove the "by" Phrase (Optional): The "by" phrase may be omitted if it is not essential to the meaning.

Example:

* Passive: The letter was written by the secretary.

* Active: The secretary wrote the letter.

Key Points to Remember

* Tense: The tense of the verb must remain consistent when converting between active and passive.

* Context: The choice between active and passive voice depends on the context and desired emphasis. Active voice is usually more direct and forceful, while passive voice can be used to emphasize the receiver of the action.

* Clarity: Avoid using passive voice if it makes the sentence unnecessarily complex or unclear.

Examples:

* Active: The scientist discovered the new element.

* Passive: The new element was discovered by the scientist.

* Active: The students are taking the test.

* Passive: The test is being taken by the students.

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