this is my book.把此单数句子变为复数句子句中的物主代词my需要变化吗 是these are my books 还是these are our books?

this is my book.把此单数句子变为复数句子句中的物主代词my需要变化吗 是these are my books 还是these are our books? 谁能帮我把英语陈述句变一般疑问句1.This is my friend.单数2.Thie is a bike.复数3.That is her brother.单数4.This is a note book.复数5.That is an eraser.单数6.It's a red orange.复数7.He is a good teacher.单数8.What is this? 把my book English is this组成一个句子 This is my book.This book is mine造句 this is my book. this book is mine 区别是什么? This is my book.对my提问 this is my English book对my English book提问 This is my book 变为一般疑问句 同义句转换This is my book. 改错题：This is a my book. This is my book用whose提问 this is my book=什么? this is my book.改为一般疑问句. This is my book改为同义句 My book this English is连词造句 L ------ ,this is my English book.填空 this book is my friend's对吗 OK,and this is my book.