Most English nouns are count nouns.
They refer to objects which are thought of as separate and distinct entities, and they have both singular and plural forms. Generally speaking, their plurals are formed in a regular and predictable way. Usually, plurals are formed by adding - s to the singular, or unmarked form of the noun. When Shirley Wang's grandfather came to visit her from China, it was the first time he had ever been on an airplane. The plurals of some count nouns are formed in irregular ways.