The given sentence is "She has written letters." We need to rewrite this sentence using the passive voice.
The passive voice is used when the subject of the sentence is the receiver of the action, rather than the doer of the action. In this case, the doer of the action is "she" and the receiver of the action is "letters."
Let's analyze each option and determine which one correctly uses the passive voice:
Option A:
- This option correctly uses the passive voice. "Letters" is the receiver of the action, and "were written" is the passive form of the verb "to write." However, the doer of the action is missing, so this is not the correct option.
Option B:
- This option also correctly uses the passive voice. "Letters" is the receiver of the action, "have been written" is the present perfect passive form of the verb "to write," and "by her" indicates that she is the doer of the action. This is the correct option.
Option C:
- This option incorrectly uses the active voice. It states that "Letters have written by her," which does not make grammatical sense. The subject "letters" cannot perform the action of writing.
Option D:
- This option correctly uses the passive voice. "Letters" is the receiver of the action, "are written" is the present simple passive form of the verb "to write," and "by her" indicates that she is the doer of the action. However, the tense does not match with the original sentence, which uses the present perfect tense. Therefore, this is not the correct option.
Conclusion:
After analyzing all the options, we can conclude that the correct option is B: "Letters have been written by her." This option correctly uses the passive voice and maintains the original tense of the sentence.