Is this your book?单复数句互变

Is this your book?单复数句互变 Is this your English book?单复数互换 Is this your book ? 变为复数句 this your book改复数,单复数句型各变疑问句.she is my mother.变疑问句,否定回答 t Is this your book? This is ( ) book.your|yours 改错：is this book your? Is this your m( )book is this your baby?复数 Is this a book?的复数句 this is a book改为复数形式 Is it your book?复数句