Here is my book.和This is my book.有何区别

Here is my book.和This is my book.有何区别 where is my book?和is my book in the desk?有何区别 Here is my book. this is my book. this book is mine 区别是什么? My E_______ book is here. L( ),here is my book. This ie my book和this book is mine的区别 1.This is my book. My book this English is This is my book,Here you are!如何回答 This is not my book,please____it there and____mine here. This is my book.对my提问