Here is a quote from the book ¡ Buscalo! : "When the direct object of a verb is a noun referring to a specific person or persons, it is preceded by a personal a that does not translate into English." ¿Llevas a Tina? Are you taking Tina? Pablo Neruda is not the direct object, I think the quote is the direct object or subject ? In the case of giving flowers to Pablo the a is translated as " to" it's not a personal a. Flowers, direct object, " to" Pablo , who is the indirect object.