there is / there are,anyan

                                            countable nouns                               Uncountable  noun

 affirmative                    there is a sandwich.                            there is some food
                                       there are some hamburgers

 negative                        there isn't a banana                             there isn't any meat
                                       there aren't any eggs                        

    
Interrogative                Is there  an apple?                               Is there any food?
                                      Are there any hamburgers