The tone is not consistently professional or appropriate for the audience and purpose. The tone is not professional. It is inappropriate for the audience and purpose. Sentence Structure Sentences are varied in length and structure. They flow smoothly from one to another.
Sentences demonstrate some variety in length and structure.
The flow from sentence to sentence is generally smooth. There are some errors in sentence structure. There is little variety in length and structure. The flow is not consistently smooth. Errors in sentence structure are frequent enough to represent a major distraction to the reader.