How to Use an APOSTROPHE

Pin the apostrophe on the wordIn English, apostrophes are only used for:

  • Contractions (like we're, they're, it's, don't).
  • Possessive nouns (but never possessive pronouns like his, her, hers, theirs or its).


  • Sometimes to express a plural after initials or acronyms (e.g. CPA's, ID's, PhD's).  
  • IMPORTANT: Normal plurals never take an apostrophe! (E.g., the dogs, old houses, the ancient Romans, seven sisters, delicious hamburgers, the Ayoubs live there, keeping up with the Joneses, many El Pasoans.) 


  • For normal singular possessive nouns (e.g. the student's house--the house of one student), the apostrophe goes before the "s."  


  • For normal plural possessives (e.g. the students' house--the house of two or more students) the apostrophe goes after the "s." 


  • Some English plural nouns have no "s", e.g. men, women, children. These take an apostrophe and an "s" only in the possessive plural. (e.g. children's games; men's health; women's rights).


  • The possessive in words and names ending in "s" or "z" normally takes an apostrophe followed by an "s" (Gonzalez's, James's), but be guided by pronunciation and use the plural apostrophe wherever it helps: Mephistopheles' rather than Mephistopheles's. 


  • Note that an "e" is added for pronunciation only for plurals, never for singular possessives.  (e.g., "the boss's dress," never "the bosses dress.")  

And if anyone tries to tell you that apostrophes don't matter and we'd be better off without them, consider these four phrases, each of which means something completely different:

my sister's friend's lovers,

my sisters' friends' lovers,

my sisters' friend's lovers,

my sister's friends' lovers.

Some of the text and the graphic above are adapted from http://www.guardian.co.uk/styleguide/page/0,5817,184844,00.html  Graphic below from http://www.pewterkingdom.com/LastingExpressions.htm (both reproduced for classroom use only)

 

O.W. 10/05 rev. 5/09

For educational purposes only.

 

Owen M. Williamson - Education Bldg 211E - phone: (915) 747 7625 - fax: (915) 747 5655
The University of Texas at El Paso - 500 W. University Ave. - El Paso, TX 79968
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