there is a deskand chair in the room.改为否定句怎么改

there is a deskand chair in the room.改为否定句怎么改 there is a desk in the room ｛改为否定句｝ 改同义句:There is only a chair in the room. There is a chair and two beds in the room(改为同义句） Is there a chair in the room? there is someone in the room 改否定句 ls there a chair in front of the desk改为肯定句怎么改? There is a baby in the room.改疑问句和否定句 is there a reading room in the school改否定句 There is a piano in the music room用NO改为否定句 There is a computer room in the building.（改为否定句） walk on the grass.改成否定句怎么改?there is a park in our city.改为一般疑