You can teach almost anyone determined to learn them the basics required to write sentences and paragraphs that say what you want them to say clearly and concisely. It's far more difficult to get people to think like a writer, to give up conventional habits of mind and emotion. You must be able to step inside your character's skin and at the same time to remain outside the dicey circumstances you have maneuvered her into. I can't remember how many times I advised students to stop writing the sunny hours and write from where it hurts: "No one wants to read polite. It puts them to sleep."