People sometimes argue that grammar, usage, and mechanics don’t matter as long as you’re able to communicate clearly. The flaw in that argument is that clear communication requires adherence to conventions. Grammar, usage, and mechanics guidelines serve as the rules of the road. As long as everyone follows them, communication proceeds smoothly. Break the rules, and clarity suffers: readers must work harder to figure out exactly what you’re trying to express, and they may simply give up or misinterpret your intended meaning.
The following sections highlight a few rules and conventions for communicating effectively in English. These sections also provide examples to show how breaking the rules can muddle communication.
Appreciating the Purpose of Rules and Conventions