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English · Sentence Structure

Hard Sentence Structure Drill

15 hard-difficulty ACT English questions on Sentence Structure. Each question is on its own page with a worked answer explanation, the underlying rule, and a quick study tip.

Hard English Sentence Structure

All 15 questions

  1. 1 Fixing a Comma Splice The storm rolled in quickly, we barely had time to bring in the lawn furniture. Hard
  2. 2 Identifying a Sentence Fragment Although the weather forecast predicted heavy rain. The crowd at the festival kept Hard
  3. 3 Parallel Structure in a List The job requires writing reports, attending meetings, and to manage a small team of Hard
  4. 4 Repairing a Run-On Sentence The library closes at nine the students rushed to finish their group project. Hard
  5. 5 Combining with Subordination The painter finished her mural last week. It depicts the history of the neighborhoo Hard
  6. 6 Fixing a Comma Splice The storm rolled in quickly, we barely had time to bring in the lawn furniture. Hard
  7. 7 Identifying a Sentence Fragment Although the weather forecast predicted heavy rain. The crowd at the festival kept Hard
  8. 8 Parallel Structure in a List The job requires writing reports, attending meetings, and to manage a small team of Hard
  9. 9 Repairing a Run-On Sentence The library closes at nine the students rushed to finish their group project. Hard
  10. 10 Combining with Subordination The painter finished her mural last week. It depicts the history of the neighborhoo Hard
  11. 11 Fixing a Comma Splice The storm rolled in quickly, we barely had time to bring in the lawn furniture. Hard
  12. 12 Identifying a Sentence Fragment Although the weather forecast predicted heavy rain. The crowd at the festival kept Hard
  13. 13 Parallel Structure in a List The job requires writing reports, attending meetings, and to manage a small team of Hard
  14. 14 Repairing a Run-On Sentence The library closes at nine the students rushed to finish their group project. Hard
  15. 15 Combining with Subordination The painter finished her mural last week. It depicts the history of the neighborhoo Hard

How to use this drill

Open the questions one at a time. Read the prompt, decide on an answer before scrolling, then check the explanation. The point of a drill is not to "get the question right" — it's to internalize the rule so you can apply it cold under timed conditions on test day.

If you're missing more than a third of the questions in this set, drop down a difficulty tier and rebuild from there. If you're getting all of them quickly, jump up a tier and try a mixed drill across subtopics.

What "Hard" means here

Hard questions are designed to separate strong test-takers. They typically require multiple rules applied in sequence, or careful elimination among answers that all look plausible. Expect to see these appear later in real ACT sections; even strong test-takers miss a couple per test.

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