This document discusses the use of "there is/are" in English. It explains that "there is" is used with singular nouns and uncountable nouns, while "there are" is used with plural nouns. Some examples of sentences using "there is/are" are provided to demonstrate how to indicate the existence or position of things. The document also covers negative and interrogative forms like "there isn't/aren't" as well as questions using "how much" and "how many".