The books are in the bookcase.变为否定句

the books are in the shelf纠错 There are many books in the l____. Are they in the books 翻译 Are there many books in the study Many people are reading books in the My books are in the backpack. 翻译the books are packed in newspapers The students are engoying______(read) their books in the classroom. The books are in the bookcase.(改为一般疑问句) the books are in the bookcase.(改为否定句） ______(they) books are in the bag on the chair. Are the books in the bookcase?(作肯定回答) The books are in the bookcase(改为否定句) The books are in the bookcase.变为否定句 Are the books in the backpack?（作否定回答） where are the books? These are the books.T___ are in backpack.怎么写? These are the books.T___ are in backpack.空里填什么?