Common nouns do not need to begin with a capital letter. A proper noun is a name given to a specific person, place, or thing.
Proper nouns begin with capital letters.
Each sentence below contains two nouns. They are either both common nouns or both proper nouns. Underline the nouns and then indicate whether they are common or proper. The answers for the first two sentences are done for you. It's not a good idea to eat green beef .