“This is she” vs. “This is her”
A common example is the phrase “This is she.” used to answer a telephone. ‘She’ is the nominative form of the word, so it cannot be used to describe somebody who is the object of a sentence (in this example, ‘this’ would be the subject). The correct way to phrase the example would be “This is her.”, though most people prefer the familiar businesslike shorthand “Speaking.”
From another site, this was the response:
“This is she” is grammatically correct. The verb “to be” acts as a linking verb, equating subject and object. So this is she and she is this; “she” and “this” are one and the same, interchangeable, and to be truly interchangeable they must both play the same grammatical role—that of the subject.
I am quite confused! I believe “This is her” is correct because it is understood that “speaking” is simply omitted; thus, we know the speaker is implying “This is her speaking” when she answers “This is her.” After all, we ask to speak to her. When she answers that she’s the one who had answered the call, she’s (obviously) speaking at the time. Therefore, it is her speaking.
What is your opinion on the matter?