Staff photojournalist Shawn Rocco and staff writer Martha Quillin reported this week on Cary homeowner David Bowden's very large message to the town of Cary.

A colleague's recent note led me to try to find the rules for using dashes.

Two advertisements caught our eyes this week. They have apostrophe problems, but different ones. The first, pictured below, falls into the old trap of using an apostrophe to make a plural. The shopping center mentioned in this ad, which came as a direct mail flier, is Clayton Corners (multiple corners).

The second ad appeared on television. It has a more unusual apostrophe problem, as you can see below. We use apostrophes to make nouns possessive, a vestige of a time when English was a more inflected language, when words changed form to indicate their function in a sentence. Pronouns still change form when they are used in the possessive case, but nouns merely take 's or ' . I wonder if the ad writers feared the apostrophe. Or maybe the apostrophe was just omitted inadvertently.

At the risk of sounding like a schoolmarm, I am going to repeat something that we learned early in elementary school.

Here are the simplified rules for making a common noun possessive.

• For singular nouns, add 's. man's friend, girl's dress.
• For plural nouns ending in s, add ' (apostrophe only). boys' game, dogs' leashes.
• For plural nouns not ending in s, add 's. men's friend, children's games.

There are, of course, variations on the rules, but these rules will carry us through most cases.

Update: A commenter questioned whether the shopping center mentioned in the first ad was indeed Clayton Corners. It is. Below is a photo of the shopping center's sign.