English grammar, actually explained

Yes. Every lesson, every exercise and the level test are free with no account. Your progress is kept in this browser. The AI features (checking your own sentences and your writing) have free daily limits.

Take the free level test first: it estimates your CEFR level and rings the lessons you actually need on the grammar map. As a rule of thumb, master tenses and articles before clauses, and complex sentences before Band 7+ structures like participle clauses and inversion.

Checkers correct today's text but they don't stop tomorrow's mistakes. Here every rule has a lesson with timelines and a 'which one?' guide, exercises that explain every answer, and a round of the questions you missed. The IELTS checker also scores grammatical range, which proofreading tools can't see.

Band 7 requires 'a variety of complex structures' used with 'frequent error-free sentences'. In practice that means relative clauses, conditionals, passives and concession clauses, used accurately. Our IELTS grammar guides break down what each band requires.