who or whom

Question

Just a comment.  I think this subject is difficult without making the English incorrect.  It becomes much more understandable when the translation is made using correct English.  Some examples:¿A quién le enviaste la carta?Who did you send the letter to?The English should be:   To
whom did you send the letter?¿Para quién has
comprado esas flores tan bonitas?Who have you bought such pretty flowers for?The English should be:   For whom have you bought
such pretty flowers?¿Con quiénes vais
de vacaciones?Who are you going on holiday with?The English should be:   With whom are you
going on holiday?¿Por quién harías
una locura?Who would you do something crazy for?The English should be:   For whom would you do
something crazy?This does not include all the examples, but it is enough to see the problem.

Answer

Well, the problem is that the alternatives here offered aren't "correct English"; they aren't INCORRECT, but they use a type of English construction that does not reflect how most people write, much less speak, Modern English. These "rules" about not separating prepositions from nouns and pronouns, among other similar curiosities, have their origins in a style of elitist prescriptivism that mostly originated in the 18th century, I believe, when it was fashionable to model usage off of Classical Latin. They didn't (probably) at any time have much to do with how the vast majority of people actually used the language (what modern Linguists would call "correct" usage), but seemingly had more to do with creating a culture of exclusion to signal status. But in any event, even if they were more widely used in the past they certainly are not today. "Whom", on the other hand, is an entirely separate and interesting case, with a long history of correct usage--but most would agree it's now almost completely obsolete in any sort of standard English.

In short, no modern person would say or write "With whom are you going on holiday?" unless they were making a deliberate statement, or had some other very specific purpose in mind (like for instance, writing Jane Austin fan literature). "Who are you going on holiday with?" (or in the US, "Who are you going on vacation with?") is indeed the normal, correct form in standard dialects of modern English. I would add that if the "with whom" form helps Spanish students as a model for wrapping their heads around the proper Spanish word order, that's great--but to suggest it's the more "correct" form is inaccurate.