1、There are some children helping the old.（改为单数句）2、There is much food in the kitchen.（改为否定句）3、There is a glass of milk in my hand.（对划线部分提问）3、There is a glass of milk in my hand。（对a glass of 提问）

1、There are some children helping the old.（改为单数句）
2、There is much food in the kitchen.（改为否定句）
3、There is a glass of milk in my hand.（对划线部分提问）
3、There is a glass of milk in my hand。（对a glass of 提问）