Problems with language leave the reader wondering what the writer is trying to say. Sentences are well built, with strong and varied structure that invites expressive oral reading. Sentences are constructed in a way that helps make meaning clear. Purposeful sentence beginnings show how each sentence relates to and builds upon the one before it. The writing has cadence, as if the writer has thought about the sound of the words as well as the meaning.
Sentences vary in length as well as structure.
Fragments, if used, add style. Dialogue, if used, sounds natural. The text hums along with a steady beat, but tends to be more pleasant or businesslike than musical, more mechanical than fluid. Sentences may not seem artfully crafted or musical, but they are usually grammatical. They hang together.