1、There aie some tomatoes in the refrigeratar(改为否定句）
There aren't any tomatoes in the refrigeratar.
2、They have a lot of stear.否定句
They don't have any stear.
3、Must you make a shopping list?否定回答
No,you needn't.
4、I must go to the bakers i want to buy some bread.连句
I must go to the bakers to buy some bread.