Answered By: Rachel Willard Last Updated: May 02, 2017 Views: 342
Apostrophes are punctuation marks used to indicate possession or ownership. The placement of an apostrophe depends upon the word that you are making possessive. Most words will require the addition of an apostrophe and an s to make the word possessive; however, there are a few exceptions, such as when the word is already plural with an s. (See the link provided in the Additional Resources section below for examples of these.)
Note: Singular nouns ending in s still take an apostrophe and an additional s (i.e., Jones's theory).
Note: Apostrophes are also used to create contractions (combinations of two words such as can’t or don’t.) However, you should avoid using contractions in academic writing.
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