Is there any bread?
Yes, there is
There isn't some/any cake
There isn't ANY cake
There ... some potatoes
There ARE some potatoes
There ... any milk
There ISN'T any milk
Is there any fish?
Yes, there is
Are there any tomatoes?
Yes, there are
Are there any beans?
No, there aren't
There is a/an orange
There is AN orange
There ... some cheese
There IS some cheese
There ... any grapes
There AREN'T any grapes