 punctuation matters. Let's call Grandma means I want you to help me make a phone call to our grandmother. Let's call Grandma means I'm talking to Grandma. This sign says that three things are not allowed. There is no smoking food, no drinks photography, and no pets. This sign says women's way. Unfortunately, women is already plural. You need an apostrophe s to show possession. This sign says that flour tortilla filled with fresh halibut, mayonnaise, lettuce, and pico de gallo belongs to one halibut taco. I think they meant that there are more than one halibut taco. It should be plural, halibut tacos. Andy's barbershop is correct. This is the barbershop that belongs to Andy. But let's look at the blue sign. Barbershop. This means that more than one barber goes out to buy things. This is a very strange question. Do you have a library card because I'd like to check you out? I think they put the question mark in the wrong place. This sign has two mistakes. Fire. It will swallow everything in its way. Only we pretend, see the quotation marks? Only we firefighters can stand up to it. Be careful with punctuation. It really matters.