there is a bookstore on the left.变否定句

连词成句：on,left,the,is,the,bookstore. there be句型怎么 变疑问句和否定句 there is a pencil on the desk The bookstore is on the left. There is a bookstore near here.（否定句） There is a cat under the tree.变否定句 near,the bookstore,on the left,the supermarket,is?怎样连词成句 连词成句left it is bookstore the on of the There is a map on the wall .改成否定句 There is a book on the desk.(改为否定句) there is a storybook on the desk改成否定句 There is a light on the desk.【改为否定句】 There is a light on the desk.改为否定句