Las diferencias entre WHO y WHOM

 

Who?: is used to ask about the subject. 

Who(m): is used to talk about object. 

Ex: Ana is talking to Diana. 

To find out the object, you need to build the questions by this way:

Who is talking to Diana?  Resp: Ana. 

At the same time, to ask baout the subject, you must do the questions like this:

Whom is Ana talking to?   Resp: To Diana.