What are some examples of common nouns in sentences?

First, a common noun is different from a proper noun. A proper noun is the name of a person or a place-- Joseph, Alaska, Maria, England. But a common noun is just a general Word that is a thing or a group of things: "book" is a common noun, and so is "books." Another common noun is "Apple," or "car," or "notebook," or "dishwasher." So, to use a common noun in a sentence is easy because there are so many of them: I was washing the dishes(common noun). I bought a new book (common noun) yesterday.