1 Use apostrophes to form the possessive case of nouns.
▪It’s OK to form possessives from acronyms. ▪Avoid the possessive forms of company names, product names, and feature names. ▪If a singular noun ends with an s, x, or z, add an apostrophe and an s as with any other noun. ▪With plural nouns that end with an s, put the apostrophe after the s. ▪With plural nouns that don’t end with an s, add an apostrophe and an s as with singular nouns. 2 Use apostrophes to indicate missing letters or missing numerals in a contraction.
Differentiate between the contraction it’s (it is) and the possessive pronoun its.
3 Don’t use an apostrophe to indicate the plural of a singular noun, the plural of an acronym, or the plural of a numeral.
Only use apostrophes to form the plural of single letters, symbols, and mathematical signs.
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