While most writers have mastered how to make a noun plural and how to make it possessive, doing both often causes confusion. Here then is a simple primer (although as with most rules in English, numerous exceptions apply).
- Add an apostrophe followed by “s” (‘s) to the end of a noun to make it possessive if the noun is singular—it does not matter if the noun already ends in “s.” For example, “Dr. Seuss’s books are popular.”
- Add just an apostrophe and no “s” if the noun is plural, possessive, and already ends in “s.” For example, “Telecenters’ services are vital in many communities in developing countries.”