Thanks for answering AlexinNotTurkey. I had a similar question. I guess what I want to know is where verbs "exhibit person" the personal pronoun can be omitted.
i often agree with you and do appreciate your help, but in English, they are interchangeable and accurate. I read books for my children (they are are able) but i am doing it in their stead, hence i read it for them :) or better, i am reading it for their enjoyment so it's said "for" not to. like a gift :)