To express the sentence 'She is reading an email' in passive voice, rephrase it to 'An email is being read by her,' following the rules of subject and verb agreement in passive constructions.
The transformation of the sentence from active voice to passive voice involves a change in the structure to emphasize the object of the action. In the original sentence, 'She is reading an email,' the focus is on the active role of 'she' in reading the email.
When rewritten in the passive voice as 'An email is being read by her,' the emphasis shifts to the email as the subject of the action. The transformation includes making the object ('an email') the subject of the sentence, introducing the phrase 'is being read' to convey the passive action, and mentioning the original subject ('her') as the agent with the addition of 'by.'
This alteration in voice allows for variation in sentence structure, providing different perspectives and nuances to the communication of the same idea.