http://theoatmeal.com/comics/who_vs_whom Liked this

Hi Estela, Basically, the two words serve their purpose of focusing on different groups of people. 1. Those who do an action (who) Who created this mess? Who will be going for the exhibition tomorrow? Who are you writing to? 2. The person who receives the effect of your action (whom) Thomas, whom you talked to, is now crying. (Thomas received the message from your mouth). The man, whom you arrested just now, is refusing to talk. (The man received your action of arresting just now). We can also use "whom" to formulate questions. Example: To whom are you writing? (Focusing on the person who will receive your writing) For whom are you baking a cake? (Focusing on the person who will receive your cake) With whom are you travelling to Madrid? (Focusing on the person who will receive your companionship while travelling to Madrid) So as you can see, there is a difference in the usage between these two words. "Who" focuses on the doer. "Whom" focuses on the receiving of someone else's actions. Hope this helps. Cheers, Lance

Who can be used as a subject and whom can be used as an object? Who are you ? Who told you? The lady who is sitting there is Anne. To whom did you call last night? The girl whom I called last night is Anne. Just examples.

Hola Estela, Quiere usted la respuesta en inglés o en espanol? The difference is this: "who" is used when referring to a subject (S) and; "whom" is used when referring to an object (O) or following a preposition (P). In the sentence "the man sees the dog", the verb is "see", the man is doing the seeing so is the subject (S) and the dog is the one being seen and is the object (O). Some example sentences: 1) The man (S), who saw the dog (O), is nice. * Here, I'm paraphrasing "The man (S) is nice and he saw the dog (O)." 2) The man (O), whom the dog (S) saw, is nice. * Here, I'm paraphrasing "The dog (S) saw the man (O) and the man is nice." 3) My friends, with (P) whom I speak every day, are nice. * Here, I'm using the preposition "with" so it must be followed by "whom". However, in colloquial speech most speakers don't use "whom" and simply say "My friends, who I speak with every day, are nice". Es un poco difícil a entender pero espero que este le ayude. James