CHAPTER 3 Grammar,Usage,and Mechanics Purpose,strategy,and style are decided by you.But the de- cision must be made within limits set by rules over which you have little control.The rules fall into three groups:grammar, usage,and mechanics. Grammar Grammar means the rules which structure our language.The sentence "She dresses beautifully"is grammatical.These var- iations are not: Her dresses beautifully. Dresses beautifully she. The first breaks the rule that a pronoun must be in the sub- jective case when it is the subject of a verb.The second vio- lates the conventional order of the English sentence:subject- verb-object.(That order is not invariable and may be altered, subject to other rules,but none of these permits the pattern: "Dresses beautifully she.") Grammatical rules are not the pronouncements ofteachers, editors,or other authorities.They are simply the way peopleCHAPTER 3 Grammar, Usage, and Mechanics Purpose, strategy, and style are decided by you. But the de￾cision must be made within limits set by rules over which you have little control. The rules fall into three groups: grammar, usage, and mechanics. Grammar Grammar means the rules which structure our language. The sentence "She dresses beautifully" is grammatical. These var￾iations are not: Her dresses beautifully. Dresses beautifully she. The first breaks the rule that a pronoun must be in the sub￾jective case when it is the subject of a verb. The second vio￾lates the conventional order of the English sentence: subject￾verb-object. (That order is not invariable and may be altered, subject to other rules, but none of these permits the pattern: "Dresses beautifully she.") Grammatical rules are not the pronouncements of teachers, editors, or other authorities. They are simply the way people