Is this a book 改成复数形式 Those are chairs 改成单数形式 What are these 改成单数形式

改成复数形式．4.This is a book. lt this a book 改成复数句 Is this a book 改成复数形式 Those are chairs 改成单数形式 What are these 改成单数形式 改成复数句This is a book.That isn't an egg.Is this a book?Yes,is is.Your picture is very good. This is a book 改为复数句 this is a book改为复数形式 Is this a book?的复数句 Give me some glasses,please(改成同义句） This book is tom's(改成同义句）Is your friend a tourist,too(改成复数句） There is a book on the chair.(改成复数) This book is new.复数 Is this a science book?改成疑问句This is a science book,____? this is a chinese book改为复数句 Is this a book?的复数形式是什么?3Q here is the book改成复数句 This is a sheep怎么改成复数句?急 this is a beautiful cat 改成复数形式 英语复数形式it this a book,it is a pen,there is a book,以上改成复数形式.those are chair,what are these,以上改成单数is,coat,his,where连词成句，pen,book,watch,foot,man,woman,family,boy,child,girl复数形式，用正确形式 This is a book(改复数) _______ _______ bookThis is a book(改复数) _______ _______ books