That is his book.怎么改为复数句

is that his a room?怎么改/ Is that his dictionary怎么改陈述句? 把Is that your math book 改为陈述句怎么改 That is his book.怎么改为复数句 That is my book.改否定句 That book is his?改为复数形式 Is that his book?中文是什么 This book is his,that book is____(I) we all know that this book is very worth reading哪里错了,怎么改 , 把this book is the same as that one改成否定句,怎么改 Is it book?这个句子怎么改 this book is mine book.哪里错了?怎么改? He does his book改为一般疑问句怎么改? IT IS AM ENGLISH BOOK 改复数怎么改啊 That book is his的同义句是什么 1.Is that his book? （肯定回答怎么说?） That is his brother.改成一般疑问句,怎么改并作肯定回答和否定回答 This book is his.(改同义句)This book _______ ______ ______.