Language Use and Conventions
Readers reward prose that is controlled, precise, and appropriately formal because clear language makes the argument easier to trust.
Core Idea
Language Use and Conventions rewards control. Grammar should be dependable, diction precise, sentences purposeful, and tone appropriate for a formal argument.
Understanding
This domain is about control, not decoration. The essay does not need ornate language. It needs sentences that are accurate, readable, and appropriate for a formal argument.
- What earns points: grammar that stays out of the way, diction that names the real claim, sentence variety used for emphasis, and a tone that sounds measured rather than casual.
- What weakens scores: vague praise, slang, tangled sentences, or technically correct prose that still feels repetitive and imprecise.
- Revision move: after drafting, do one sentence-level pass where you ask three questions: Is this correct? Is this precise? Is this the tone of an argument rather than a conversation? If not, revise before adding new ideas.
Worked Example
Which revision would most strengthen an ACT essay in the Language Use and Conventions domain?
Select an answer to see the explanation
Concept Guides
4Use standard written English grammar, syntax, and mechanics with control.
Standard English grammar and mechanics keep the argument readable and controlled.
Choose words for clarity and precision; avoid vague or repetitive diction.
Precise diction names the exact action or effect instead of leaning on vague praise.
Vary sentence structures to improve readability and emphasis.
Sentence variety helps an essay move clearly and makes key ideas stand out.
Maintain an appropriate style and tone for an argumentative essay.
A strong ACT essay sounds formal, measured, and credible rather than casual or sarcastic.