This document summarizes the difference between countable and uncountable nouns in English. It provides examples of common countable nouns like "apple" and "banana" which can take both singular and plural forms, as well as uncountable nouns like "rice" and "water" which only have one form. It also discusses how to use "there is/there are" and negatives like "there isn't/there aren't" correctly depending on whether the noun is countable or uncountable.