Hi Product Hunt 👋 I built LingoChallenge because every grammar app I tried ran out of material. A few hundred sentences per topic, and by the third session you're answering from memory instead of from grammar. So I went the other way and started with the material. There are 50,000 fill-in-the-gap sentences here, across 105 grammar forms — present simple through mixed conditionals, passive voice, reported speech, the lot. Most of the work wasn't code. It was reading the corpus topic by topic and fixing what was broken: answer keys that were simply wrong, sentences where two of the options both fit, distractors that gave the answer away, present continuous hiding inside a past simple set. Thousands of corrections, one topic at a time. That part is still going — I'm now tagging every sentence by CEFR level so the practice can match where you actually are. No account, no paywall, no streaks to maintain. Pick a topic, answer ten questions, see what you got wrong and why. I'd genuinely like to know: which grammar topic do you find hardest to explain or to learn? And if you hit a question where two answers seem right — tell me. That's a bug in my material, and I'll fix it.

LingoChallenge

Free English grammar drills: 100+ forms, 50,000+ sentences

Free English grammar drills: 100+ forms, 50,000+ sentences