Grammar practice

Error Correction

Each sentence has exactly one mistake. Choose the part that is wrong. Filter by level to practise at your own stage.

Error Correction shows you a complete sentence with exactly one mistake already hidden inside it — your job is to spot which part is wrong, not to fill in a blank.

What Is Error Correction?

Error Correction is English Finders’ second grammar tool, and a genuinely different skill from Grammar Quiz. Where Grammar Quiz shows a sentence with a blank and asks you to choose the correct word, Error Correction shows a complete, fluent-looking sentence broken into parts, with one part containing a mistake — you pick the part that’s wrong. It draws from English Finders’ own hand-written bank of seventy-two sentences, twelve at each CEFR level from A1 to C2, spanning twelve grammar topics.

How to Play Error Correction

  • Choose a CEFR level from the dropdown, or leave it on “Any level” to mix levels.
  • Read the full sentence shown at the top.
  • Look at the parts of the sentence listed as options below it.
  • Tap or click the part you think contains the mistake.
  • The quiz tells you straight away if you were right, and shows an explanation of what the mistake was.
  • Keep going until you reach the end of the ten-sentence session, then start a new one if you like.

Error Correction Rules

  • Each session is ten sentences long.
  • Every sentence has exactly one mistake, split across up to four selectable parts.
  • You get one answer per sentence — once you pick a part, that round is scored and locked in.
  • After you answer, Error Correction explains what the mistake was and why.
  • The sentence bank is small and hand-written rather than pulled from a dictionary, so once you’ve seen every sentence at a level, the quiz starts repeating them rather than ending the session early.
  • Error Correction is free to play, with no account or sign-up required.

Benefits of Playing Error Correction

Spotting an error that isn’t flagged for you is a different, arguably harder skill than choosing a correct answer from a shortlist — it’s closer to proofreading your own writing than to answering a quiz question. Because every mistake comes with an explanation, Error Correction doubles as a quick grammar refresher on topics like articles, prepositions, verb tenses, and passive voice. With sentences spanning all six CEFR levels, it also works alongside Grammar Quiz — the two tools cover the same broad skill from opposite directions.

Tips for Error Correction

  • Read the whole sentence first rather than checking each part in isolation — some mistakes only stand out once you hear the sentence as a whole.
  • Watch for the usual suspects: articles (a/an/the), prepositions, verb tense, and subject-verb agreement account for a lot of common mistakes.
  • Start with a CEFR level close to your own stage, since higher levels bring trickier topics like passive voice, reported speech, and conditionals.
  • Read the explanation even when you get it right, to make sure your reasoning matches the actual rule.
  • Try Grammar Quiz alongside this tool — it practises the same grammar points from the opposite direction, filling in a blank instead of spotting an error.

Who Can Play Error Correction?

Error Correction suits any English learner who wants to sharpen their eye for mistakes rather than just recognise a correct answer when it’s offered to them. Because it spans all six CEFR levels and explains every mistake, it works for beginners still learning basic rules like articles and present tense, and for advanced learners tackling trickier topics like passive voice and reported speech — including anyone preparing for exams like IELTS or Cambridge that include error-identification or proofreading tasks.

Frequently Asked Questions

What is Error Correction?

Error Correction is a free tool from English Finders that shows you a complete sentence with one hidden mistake, and asks you to identify which part of the sentence is wrong.

How many sentences are in each session?

Ten sentences, answered one after another.

Does Error Correction explain the mistake?

Yes — after you answer, it explains what the mistake was and why, whether you got it right or not.

What CEFR levels and topics does Error Correction cover?

All six CEFR levels, A1 through C2, with seventy-two sentences in total across twelve grammar topics, including articles, prepositions, verb tenses, passive voice, reported speech, and conditionals.

Is Error Correction free to play?

Yes — no account or sign-up is required.

Related Practice Tools

Want to practise a different skill? Here are more free tools from English Finders’ Practice hub.

Pronunciation Practice Say the word out loud and see if your browser recognises it. Filter by level to practise at your own stage. Grammar Quiz Choose the word that completes each sentence correctly. Filter by level to practise grammar at your own stage. Vocabulary Quiz Choose the meaning that matches the word. Filter by level to practise vocabulary at your own stage. Spelling Quiz Listen to the word and type what you hear. Filter by level to practise spelling at your own stage. Sentence Builder Put the shuffled words back into the correct order. Filter by level to practise sentence structure at your own stage. Definition Match Pair each word with its meaning. Harder than a quiz: the meanings are all plausible.
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