A. Spell a proper noun with an initial capital letter. A proper noun is a "name" of something, for example Josef, Mary, Russia, China, British Broadcasting Corporation, English.
Example:
1.We have written to Mary.
2. Is China in Asia?
3. Do you speak English?

B. Spell proper adjectives with an initial capital letter. Proper adjectives are made from proper nouns, for example Germany → German, Orwell → Orwellian, Machiavelli → Machiavellian.
Example:
1. London is an English town.
2. Who is the Canadian prime minister?
3. Which is your favorite Shakespearian play?