is this her book?

this book is hers.her为啥加s,this is her book .这又是怎么回事 is that her book与is this her book那个对 有何区别 This is Sandy's book.please give her the book（改同义句） This is This book _________Lucy's book.Her name is on the book cover This is her book怎么改为否定句 This is Lucy' book.Can you take it to her? This book is her.这句话错在哪里? book,is,this,not,her.请连词成句! This book be Carla's Her name is on the book 选词填空 This isn' my book.That is ____ book.（my,your,his,her,it This book _______ Lucy’s . Look! Her name is on the book cov This book is Kate's.Please give ______.A,her it B,it her C,h