Using correct grammar and punctuation is critical if you have to write a report or other important document. A noun is a part of speech that refers to a person, place or thing. A proper noun is the specific name of a person, place or thing (such as "Susan" or "Oklahoma"). If something belongs to a proper noun, you must use the correct possessive form of this noun.
Instructions
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1
Write the proper noun.
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2
Add an apostrophe at the end of the name.
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3
Add an "s" after the apostrophe. For example, "Tom" becomes "Tom's."
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4
Omit the "s" after the apostrophe if the word ends in the letter "s." For example; write "Charles'."