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English grammar quizzes with answers and explanations, A1 to C2

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New: Direct and Indirect Questions in Workplace Messages · Common Preposition Mistakes in Work Messages · Workplace Prepositions: In, On, At, By, and Until

Explore 3770+ questions across 300+ grammar challenges, from A1/A2 to C1/C2.

Preparing for an exam, polishing your writing or breaking old grammar habits? Start with the free CEFR level test: fresh questions every time, your estimated level, a score for each band from A1/A2 to C1/C2, and the topics to fix first.

Or practise by topic: our practice challenges each train one grammar topic, and every question explains why the answer is right. Each result opens with a "Needs work" list that links straight to more practice.

Looking for something specific? Try verb tenses, IELTS preparation or the tag tree below.

Log in or create an account to keep your results. Your profile then shows a Progress map — every grammar area rated Weak, Fair or Strong from your recent work, weakest first — and saves each level test with its A1/A2 · B1/B2 · C1/C2 breakdown and a link back to the full report. Practise the weak topics and watch the ratings change.

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The English Grammar tree breaks topics down by grammatical category — from determiners to verb tenses and everything in between. Our taxonomy overview explains how we organized it all. The categories are not set in stone— we continue refining them to be as useful as possible.

CEFR stands for the Common European Framework of Reference for Languages — a widely-used standard for benchmarking language ability from beginner (A1) to mastery (C2).

Difficulty Levels reflect the content authors' judgment of how challenging each question is, so you can start easy and work your way up.

What's New

November 1, 2026 — New Challenges:

Direct and Indirect Questions in Workplace Messages Have you ever sent a quick message to a colleague and realized your grammar was a little off? Master workplace communication by practicing direct question word order, indirect questions, polite requests, and tricky adverbs like also and still.
Common Preposition Mistakes in Work Messages Do you ever wonder if you should "discuss the menu" or "discuss about the menu"? Master professional communication by fixing common mistakes with verbs that take no preposition, matching nouns with specific prepositions, and choosing the right forms of regarding and reply to.
Workplace Prepositions: In, On, At, By, and Until Are you on a meeting or in a meeting? Master the tricky differences between in, on, at, by, and until when talking about digital platforms, documents, and project deadlines at work.
Apostrophes at Work: Contractions, Possessives, and Plurals Ever panicked after sending an email with an embarrassing typo? Master the rules for contractions, singular and plural possessives, time possessives, and plural acronyms to keep your work messages perfectly punctuated.
Work Compounds: Verbs, Nouns, and Hyphenated Modifiers Ever wonder whether you should "set up" a meeting or "setup" a meeting? Master the tricky spelling of phrasal verbs vs. nouns, hyphenated compound modifiers, and open compounds in everyday workplace messages.

October 31, 2026 — Site Update:

GrammarError Is Smoother on Your Phone We've improved the site on phones: pages load faster, buttons are easier to tap, everything fits the screen, and you can add GrammarError to your home screen like an app. Find your level with the free CEFR level test (A1–C2), practise by grammar topic with 300 tagged challenges, and track your strong and weak topics as you go.

October 26, 2026 — New Challenges:

A, An, or The in Work Updates Ever hesitated before hitting send because you weren't sure whether to write "a SMS" or "an SMS"? Master your workplace messages by practicing definite vs. indefinite articles, vowel sound rules for acronyms, and zero articles for uncountable nouns.
Uncountable Work Nouns: Information, Feedback, and Access Have you ever accidentally asked a colleague for "an advice" or "some informations"? Test your professional English by mastering uncountable work nouns, choosing the right quantifiers like "some" and "any", and avoiding tricky plural mistakes with words like access, feedback, and information.
Fixing Dropped Words in Work Chat Messages Ever type so fast on Slack or Teams that you leave out an essential word? Test your ability to spot and fix missing auxiliary verbs, dropped pronouns, and omitted prepositions in everyday professional messages.
Verb Forms in Work Status Updates Have you ever sounded like a time traveler in your morning standup or sent a confusing client email? Master professional communication by fixing common errors with past simple vs. present perfect, stative verbs, future time clauses, and base forms.
Fixing Agreement Errors in Work Messages Are you making subtle grammar mistakes in your daily standup notes and Slack messages? Master professional communication by fixing errors with company names, "one of the" phrases, "there is" vs. "there are", and tricky I/me/myself pronouns.

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