a letter for you与a letter to you

a letter for you与a letter to you here is a letter for you和here is a letter to you 什么区别 write a letter to you 中的 to为什么不是for before I return to China,write a letter for you. jack,here is a letter for you Here___ a letter for you._____. Can you write a letter for me can you write a letter for me? Here is a letter for you .(英译中) here is a letter to you Can you write a letter to him? here is a letter for you和this is a letter for you 的区别