To convert the given sentence from passive voice to active voice, we need to identify the subject, verb, and object in the sentence:
- Identify the Subject: In the passive voice sentence "The assignment had been completed by her," the subject is "the assignment."
- Identify the Object: The object is "her," who performs the action in the active voice.
- Identify the Verb: The verb in the passive voice is "had been completed."
- Convert to Active Voice: In active voice, the structure is: Subject + Verb + Object. So "her" becomes "She" in active voice, and the verb "had been completed" becomes "had completed." The sentence in active voice is "She had completed the assignment."
Let's analyze the options:
- "She had been completed the assignment" – This is grammatically incorrect; "had been completed" suggests a passive structure, which is incorrect here.
- "She had been completing the assignment" – This changes the tense to past continuous, which is not equivalent to the original sentence's meaning.
- "She completed the assignment" – This changes the tense to simple past, which does not match the original sentence's past perfect tense.
- "She had completed the assignment" – This option correctly converts the sentence to active voice while retaining the past perfect tense. Therefore, this is the correct answer.
Thus, the correct conversion of the given sentence into active voice is: She had completed the assignment.