Singular Nouns and Plural Nouns not ending in "s" - Add an apostrophe and the letter “s” after the noun., Plural Nouns ending in "s" and Nouns plural in form BUT singular in meaning - Add only an apostrophe after the noun., Singular proper names ENDING IN “S” - Add an apostrophe and the letter “s” (WITH EXCEPTIONS)., Joint possession - If two or more share ownership - Add an apostrophe ONLY to the last name., Individual possession - If two or more people own SEPARATE THINGS - Add an apostrophe to both names., Quasi Possessives - Refers to when a noun describes time.  - An apostrophe is required to describe time. , Omitting Letters and Figures - Class of '27, Rock 'n' Roll, A double positive must refer to an... - Animate Object, Personal pronouns such as his, her, its, ours, yours, theirs, and whose - Do NOT take apostrophes. , Words ending in letters sounding like the letter "s" ...   - Still require an apostrophe and the letter "s" to convey possession. ,

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