Is this a book?的复数句

Is this a book?的复数句 this is a chinese book改为复数句 Is this your book ? 变为复数句 改成复数句This is a book.That isn't an egg.Is this a book?Yes,is Is this a book?的复数形式是什么?3Q lt this a book 改成复数句 this is a book改为复数形式 This is a book and that is a knife 改为复数句 Plrase put the clot This is a book(改复数) _______ _______ book 句型转换This is a book【改为复数句】Those are my brothers【改为单数句】Is this what is this?改复数句 This is a book.改一般疑问句 These are feet 对feet This is an English book(改为复数句）