John’s is possessive so it needs the apostrophe, but thing’s is plural only (not possessive), so it needs no apostrophe. This should read: John’s Things.
I so wish I had my camera with me this morning because I saw two signs alerting shoppers they would find CDs in the area. They read:
CD’s and CDs
I had to laugh, wondering if the sign maker thought by presenting both forms, one was sure to be correct!
Non-possesive plurals do not need an apostrophe. The correct sign is: CDs
Learn More in This Course: Business Grammar: Error-Free Writing
