Grammar can be tricky, but we have an online course to ease the pain. Grammar That Counts! walks business writers through the most important grammar principles. Why are grammar rules important? Let's take a look at action and linking verbs as an example. What Is the Difference? Action verbs describe, well, action. You picture in your mind the intent. Using action verbs often improves your writing because of the clear picture the words paint. The verbs often denote movement or