Hi,
I read from somewhere that said that if you are not sure of the fact whether a pronoun is the subject or object, you should turn the sentence around, but I am not sure how it works or is supposed to work.
The worst student is her. -- What is the subject here? I think it is 'student',
To test this, you should turn the sentence around.
Her is the worst student.
Doesn't work so the proper pronoun is 'He'.
I don't know still. Can you explain it in?? another way?