Writing is a process.
When you begin working with a tutor, the tutor will help you locate your major errors and teach you how to correct them and how to avoid them in your next paper. As you practice what you've learned, your writing will improve. Grades reflect your teacher's perception of your learning. Coming in for help does not mean that the paper you are working on will receive an A, however, as you continue to learn specific writing skills, your papers will continue to show improvement. Write as much as you can of your paper before you come.