• Use the apostrophe to show possession. To show possession with a singular noun, add an apostrophe plus the letter s.
  • Many common nouns end in the letter s (lens, cactus, bus, etc.). So do a lot of proper nouns (Mr. Jones, Texas, Christmas). There are conflicting policies and theories about how to show possession when writing such nouns. There is no right answer; the best advice is to choose a formula and stay consistent.
  • Some writers and editors add only an apostrophe to all nouns ending in s. And some add an apostrophe + s to every proper noun. One method, common in newspapers and magazines, is to add an apostrophe + s ('s) to common nouns ending in s, but only a stand-alone apostrophe to proper nouns ending in s.

Comment Stream