ACT Writing study materials
ACT Writing study resources

ACT Writing: Language Use and Conventions: Clarity, Precision, and Mechanics

ACT Writing · Work through your exam, one topic at a time.

All guide sections

Language Use and Conventions: Clarity, Precision, and Mechanics

What this domain tests

Language Use and Conventions covers sentence clarity, word choice, grammar, and punctuation. Graders reward prose that is easy to read, precise, and mechanically sound, because clear language lets your ideas land.

Concepts to master

  • Clarity and concision. Cut filler ("in order to" becomes "to"; "due to the fact that" becomes "because"). Prefer active, direct sentences.
  • Precision. Choose words that mean what you intend. "Affect" versus "effect," "fewer" versus "less," "imply" versus "infer."
  • Sentence variety. Mix short and long sentences and vary openings; a string of identical structures reads mechanically.
  • Mechanics. Watch subject-verb agreement, pronoun reference, comma splices, apostrophes, and parallel structure in lists.

Traps to avoid

  • Overwriting. Big words used wrongly ("utilize" for "use") reduce clarity.
  • Comma splices. Two independent clauses need a period, semicolon, or conjunction, not just a comma.
  • Faulty parallelism. "Volunteering teaches responsibility, empathy, and how to be patient" should be "responsibility, empathy, and patience."
  • Unclear pronouns. "They" with no clear antecedent confuses readers.

Rule of thumb

Read each sentence aloud. If you stumble, the sentence is probably too long or tangled. Split it or cut words until it flows.

Worked example

Original: "Due to the fact that students are busy, they should be able to, in some cases, choose alternatives." Revised: "Because students are busy, they should sometimes be allowed to choose alternatives." The revision removes filler, fixes the vague pronoun, and tightens the sentence without changing meaning.