The document discusses using there is/are to identify singular or plural nouns in sentences and questions. It provides examples of sentences containing baby giraffes, butterflies, elephants, planes, goats and ducks to illustrate plural nouns using "there are". Examples of questions with singular nouns like rabbit and plural nouns like apples or corals are given to demonstrate answering with "yes, there is/are" or "no, there isn't/aren't".