More Proper Nouns - People's titles, names of holidays, days of the week, places, and months are also proper nouns. The important words in these nouns are capitalized. A noun can tell who, what, or where. Singular Nouns - A word that names one person, place, thing or idea. If a noun ends in y, replace the y at the end with an i and add es to form the plural.
Some nouns change spelling for the plural form.
Possessive Nouns Possessive Noun - shows ownership. It tells what someone or something owns or has. The word scientists' tells that the discoveries belong to the scientists. Singular Possessive Noun - shows ownership by one person or thing. To form the possessive of most singular nouns, add an apostrophe ' and s .