Common nouns and proper nouns

Nouns are either common or proper. Common nouns do not refer to a particular person, place, or thing. Common nouns are not capitalized.

In contrast. proper nouns represent specific places, people, and things. You capitalize proper nouns no matter where they appear in a sentence.

An example of a proper noun would be Luke. The name refers to a specific person. In comparison, the common noun boy could refer to any number of males.