Three books are under the besk. 改为否定句

Three books are under the besk. 改为否定句 Three books are under the desk.改为否定句 Three books are under the desk（改为否定句） Those are books（改为单数句） There are three boys under the tree 改为否定句 Three baseball are under the desk 改为否定句 He has three books.改为否定句 My notebook are under the chair.(改为否定句） the books are in the bookcase.(改为否定句） The books are in the bookcase(改为否定句) 改为否定句 The math books are on the desk. The math books are on the desk.改为否定句 the are some books on the shelf.[改为否定句]