In this English grammar question, a sentence is given in active voice. Select the option that best expresses the same idea in passive voice. Sentence: "I applied band aid to the wound."

Introduction / Context:

This question uses a simple past sentence to describe a completed action in the past. The original sentence is "I applied band aid to the wound." The task is to find a passive voice version that maintains the same time reference and meaning while making "band aid" the subject.

Given Data / Assumptions:

- Original sentence: "I applied band aid to the wound."

- Subject in the active sentence: "I".

- Object: "band aid".

- The tense is simple past with the verb "applied".

- The passive form must show that band aid was placed on the wound by the speaker.

Concept / Approach:

In simple past passive, the structure is "was" or "were" plus the past participle of the main verb. The object of the active sentence becomes the subject of the passive sentence. The phrase "to the wound" describes the location of the action and remains in the sentence. The agent "by me" appears at the end, introduced by "by".

Step-by-Step Solution:
Step 1: Identify subject, verb, and object. Subject: I. Verb: applied. Object: band aid. Extra phrase: to the wound. Step 2: Move "band aid" into the subject position. Step 3: Use "was applied" as the simple past passive form. Step 4: Attach "to the wound" after the verb phrase. Step 5: Add the phrase "by me" to show who applied it, then check that the meaning is unchanged.

Verification / Alternative check:

The sentence "Band aid was applied to the wound by me." keeps the simple past time reference, follows the passive pattern, and shows that the speaker was the one who placed the band aid on the wound. All essential information from the original sentence is still present.

Why Other Options Are Wrong:

Some options move to past perfect or present tense, which changes the timeline of the action. Other sentences use odd or incomplete structures such as "applying band aid to the wound was by me", which does not form a standard passive clause. A few choices are technically possible but more complex than needed, or they omit the main verb "was" or "had been", creating grammatical errors. For exam purposes, the simplest correct passive version is preferred.

Common Pitfalls:

Students may forget that "applied" already represents past tense and try to add extra auxiliaries that are not required. They might also treat "band aid" as an uncountable noun and try to adjust verbs incorrectly. Another typical error is to place "by me" before the location phrase in a way that breaks the natural flow of English. Using the pattern "band aid was applied to the wound by me" ensures both clarity and correct grammar.

Final Answer:

The correct passive voice sentence is "Band aid was applied to the wound by me."