I'm pretty clear on the basic use of indirect object pronouns, except for one thing: there relation to prepositional objects when using a preposition other than "a". I've studied in Bolvia, read the RAE definition of "a" and "para" (in spanish, so I could very well have missed something), looked at some other websites and asked my teacher here in California, and I still get conflicting answers.
So, to put it simply: Is it correct to use an indirect object pronoun in conjunction with, or in place of, a prepositional object?
Are the following sentences both equivalent and equally as correct?
"Juan compró el libro para Eva."
"Juan le compró el libro para Eva."
"Juan le compró el libro."
This site says it's correct to use "le" in conjunction with "para", but my professor says otherwise.
Muchas gracias!
Daniel