Why her? or Why she?

[corcove]

Hi there... I know that doubt must be silly but I just got confused when a student of mine asked me that one... Would anyone help me?

 

[5jj]

I don't understand your question. As a teacher of English, you know how we use these words, so what is the problem?

 

[Khosro]

Hi there... I know that doubt must be silly but I just got confused when a student of mine asked me that one... Would anyone help me?

What's your question exactly? Perhaps you have a problem with this:

Mr. Jackson: I asked Mary to buy the tickets?
Mrs. Jackson: why she (or her??) and not Robert?

Am I right or ... ??

By the way, welcome board corcove!

 

[Tdol]

I'd use her there.