English Grammar Hub

Understand English Grammar Faster

Browse the grammar system by level and category, then open clear explanations with practical examples.

780 Total Rules
126 Chapters
7 CEFR level
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Understand English Grammar Faster

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Active filters: CEFR level: B1
B1 Confusable-words

She-has vs. She-have: What's the Difference?

If the subject is he, she, or it, the verb is has. For everything else, use have.

  • • Use has for third-person singular subjects: he, sh...
  • • The formation is: He/She/It + has.
12 examples 8 exercises 8 FAQ
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B1 Confusable-words

Than vs. Then: What's the Difference?

Use than for comparing A vs. B, and then for showing 'first A, next B'.

  • • Use than for comparisons and then for time or sequ...
  • • Structure: `more than` or `bigger than` versus `fi...
11 examples 8 exercises 8 FAQ
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B1 Confusable-words

To-not vs. Not-to: What's the Difference?

`Not to` is formal and safe; `to not` is modern and common. Both are correct.

  • • Both `not to` and `to not` are correct ways to neg...
  • • `Not to + verb` is the traditional, more formal st...
12 examples 8 exercises 8 FAQ
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B1 Confusable-words

To-be-he vs. To-be-him: What's the Difference?

Formal rule: 'The winner was he.' Informal reality: 'The winner was him.' Know your audience!

  • • In formal English, use a subject pronoun (he, she,...
  • • Formation: Subject + 'to be' verb + Subject Pronou...
12 examples 8 exercises 8 FAQ
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B1 Confusable-words

Unless vs. Until: What's the Difference?

Unless is for a condition; until is for a clock.

  • • Unless introduces a condition, meaning 'except if'...
  • • Until marks the end of a time period, meaning 'up...
12 examples 8 exercises 8 FAQ
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B1 Confusable-words

Unto vs. Onto: What's the Difference?

Onto is for surfaces; unto is for formal situations and recipients.

  • • Use 'onto' for movement to a surface, both physica...
  • • Use 'unto' as a very formal or poetic version of '...
10 examples 5 exercises 8 FAQ
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B1 Confusable-words

Up-to vs. Upto: What's the Difference?

When in doubt, always use `up to` as two separate words.

  • • `up to` is the correct, standard two-word phrase;...
  • • Use `up to` to express a limit, a responsibility,...
10 examples 8 exercises 8 FAQ
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B1 Confusable-words

Upon vs. On: What's the Difference?

Upon is the formal version of on; when in doubt, use on.

  • • Use on for everyday situations and upon for formal...
  • • The sentence structure doesn't change; you just sw...
10 examples 8 exercises 8 FAQ
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B1 Confusable-words

Said vs. Told: What's the Difference?

'Told' always needs a listener mentioned in the sentence; 'said' doesn't.

  • • Use 'told' when you mention the listener; use 'sai...
  • • The pattern is 'told someone something' versus 'sa...
12 examples 8 exercises 8 FAQ
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B1 Confusable-words

Simile vs. Metaphor vs. Analogy: What's the Difference?

Similes are like direct comparisons, metaphors are direct statements, and analogies are logical explanations.

  • • Similes compare using 'like' or 'as'; metaphors sa...
  • • A simile's structure is 'X is like Y' or 'X is as...
10 examples 8 exercises 8 FAQ
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B1 Relative Clauses

Relative Pronouns: Using 'Who' for People

Use who to seamlessly add essential details about people, making your English sound natural and clear.

  • • Connects information about people in one smooth se...
  • • Place who after the person it describes, before th...
12 examples 8 exercises 8 FAQ
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B1 Relative Clauses

Relative Pronouns: 'Which' for Things

Use which to naturally add crucial info about things, animals, or ideas.

  • • Adds essential detail about things, animals, ideas...
  • • Forms: `Noun (thing) + which + clause`.
12 examples 8 exercises 8 FAQ
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B1 Relative Clauses

Relative Adverb: Where for Places

Where makes your sentences about places clear and concise, replacing clumsy prepositional phrases.

  • • Connects a place noun to a clause describing it.
  • • Place Noun + where + Subject + Verb.
12 examples 8 exercises 8 FAQ
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B1 Relative Clauses

Relative Clauses: Defining vs Non-Defining Meaning

Defining clauses pinpoint a specific noun; non-defining clauses just add bonus details using commas and 'which' or 'who'.

  • • Defining clauses identify exactly WHICH person or...
  • • Non-defining clauses add EXTRA info about somethin...
10 examples 8 exercises 8 FAQ
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B1 Passive & Reported Speech

Reporting What People Said (Tense Backshift)

Mastering tense backshift clarifies timelines and makes your reported speech sound smooth and natural.

  • • Tense shifts when reporting past conversations.
  • • Original verb tense moves one step into the past.
12 examples 8 exercises 8 FAQ
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B1 Passive & Reported Speech

Reported Speech: Say vs. Tell

Mastering say vs. tell makes your reported speech sound smooth and natural.

  • • Use say to report words directly or generally.
  • • Tell always needs an object (who was told).
12 examples 8 exercises 8 FAQ
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Why Learn English Grammar?

Grammar is the foundation of language fluency. Without understanding grammar patterns, you can memorize vocabulary but struggle to form correct sentences. Here's why structured grammar study matters:

Build Accurate Sentences

Move beyond memorized phrases. Understand the rules so you can create original, correct sentences in any situation.

Pass Language Exams

Grammar is tested in every major language exam — IELTS, DELE, DELF, JLPT, HSK, TOPIK, and more. Our CEFR-aligned curriculum maps directly to exam requirements.

Understand Native Speakers

Knowing grammar helps you parse complex sentences, understand nuance, and follow conversations even when speakers use advanced constructions.

Progress Faster

Students who study grammar systematically reach fluency faster than those who rely on immersion alone. Structure accelerates learning.

How Our English Grammar Course Works

1

Choose Your Level

Start with your CEFR level — from A0 Zero Point to C2 Mastery. Not sure? Begin at A0 and progress at your own pace.

2

Study Structured Chapters

Each chapter covers a grammar topic with clear explanations, pattern tables, and real-world example sentences.

3

Practice with Exercises

Test your understanding with interactive exercises — fill-in-the-blank, multiple choice, sentence building, and translation practice.

4

Track & Progress

Your progress is saved automatically. Complete chapters, unlock new levels, and watch your grammar mastery grow.

Frequently Asked Questions About English Grammar

SubLearn covers 780 English grammar rules organized across 7 CEFR proficiency levels (from A0 to C2), spanning 126 structured chapters. Each rule includes clear explanations, real-world examples, and interactive practice exercises.

Our English grammar curriculum covers CEFR levels from A0 to C2. Each level is designed to match your current proficiency — beginners start with basic sentence patterns at A1, while advanced learners tackle nuanced structures at C1-C2.

Yes! All English grammar rules, explanations, and examples are completely free to access. You can browse the full curriculum, read detailed explanations, and practice with exercises at no cost.

Grammar is organized into 126 thematic chapters following the CEFR framework. Each chapter groups related rules together — for example, verb tenses, sentence structure, or particles — so you can learn related concepts in a logical sequence.

Yes! Create a free account to track which grammar rules you've studied, see your progress across all CEFR levels, and pick up exactly where you left off. Your learning progress syncs across devices.

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