Now that you know what adjectives are, let's explore the concept of proper adjectives.
They are adjectives that are derived from proper nouns.
That definition won't do you much good if you don't know what proper nouns are!
Proper nouns are nouns that name specific people, places, things, or ideas. Think of proper as meaning specific.
America, English, Paris
Notice that proper nouns always begin with a capital letter.
Proper adjectives are adjectives that are formed from proper nouns. Most of them identify people, places, languages, or groups.
American cars, English grammar, Parisian scarf
Notice that these adjectives are still performing the job of an adjective: They are all describing nouns.
Also, notice that they all begin with a capital letter.