Finer grained standards that are part of this one
Use relative pronouns (who, whose, whom, which, that) and relative adverbs (where, when, why).
Form and use the progressive (e.g., I was walking; I am walking; I will be walking) verb tenses.
Use modal auxiliaries (e.g., can, may, must) to convey various conditions.
Order adjectives within sentences according to conventional patterns (e.g., a small red bag rather than a red small bag).
Form and use prepositional phrases.
Produce complete sentences, recognizing and correcting inappropriate fragments and run-ons.
Correctly use frequently confused words (e.g., to, too, two; there, their).