That is a bag.改为复数句 The baseball is on the sofa改为否定句 Are the

That is a bag.改为复数句 The baseball is on the sofa改为否定句 Are the The baseball is on the sofa（改为否定句） father is watching TV on the sofa.(改为否定句) the book are on the bookcase .改为否定句 the baseball is under th The baseballs are on the sofa.(改为否定句) my mother is keys are on the sofa 改为否定句 They are on the sofa改为否定句 the baseball is unber the table 改为否定句 Theg're on the sofa.改为否定句 It's under the tablr.改为复数形式 The dog is sieeping on the sofa.(改为否定句,疑问句并做回答) a bag of milk is on the desk.（ 改为复数句） that is a bag改为否定句