Answer:
The sentence "My sister has drawn this portrait" is in the active voice. To change it to the passive voice, you need to rearrange the sentence and change the verb form.
In the passive voice, the object of the active sentence becomes the subject of the passive sentence, and the subject of the active sentence either becomes the agent of the passive sentence or is omitted.
Here's the sentence in the passive voice:
"This portrait has been drawn by my sister."
In this passive sentence, "this portrait" is the subject, "has been drawn" is the passive verb phrase, and "by my sister" is the agent (the person who performed the action).
Note that the agent is optional and can be omitted if it's not important or not known.
It's important to understand that the passive voice emphasizes the object or the result of the action, rather than the doer of the action.
Step-by-step explanation:
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