1 Singular Possessive A possessive is a noun or pronoun that serves as an adjective to show ownership. For a singular possessive, place an apostrophe at the end of the noun and add an s. Example: His mom's cookies are the best. Don't use an apostrophe with a possessive pronoun (yours, his, hers, ours, yours, its, theirs). Examples: That plate is your's. Revision: That plate is yours. 2 Plural Possessive Joint Ownership When two or more words share joint ownership, the possessive form is used only for the last word. Example: Matt and Suzanne's wedding was the social event of the season. 3 Acronyms An acronym is any abbreviation formed from the first letters of each word in a phrase. Most frequently used acronyms do not require periods. Example: HTML (Hyper Text Markup Language). 4 Semicolons Use semicolons to join independent clauses with or without conjunctions. Semicolons combine related phrases or dependent clauses. Example: Anna showed up late; Louise didn't at all. 5. Colons in Business Letters Use colons after business letter salutations. Example: To Whom It May Concern: Thank you for your employment application. 6 Dashes Use dashes, not hyphes, before and after appositive Example: The best-loved movies-those with mem worth repeated viewings.