Identifying the Verb Stem (어간)
Remove the final `다` from any dictionary verb or adjective to reveal its essential, unchanging stem.
- • Dictionary forms always end in `다`.
- • The verb stem is the dictionary form minus `다`.
Browse the grammar system by level and category, then open clear explanations with practical examples.
Remove the final `다` from any dictionary verb or adjective to reveal its essential, unchanging stem.
Use `하고` attached directly to a noun to mean 'and' or 'with' in spoken conversation.
Use `-(으)세요` to give polite requests or directions to others without sounding bossy or rude.
Use the `요` ending for 90% of daily interactions to sound polite but friendly and natural.
Korean question words replace the noun they ask about and don't require changing the sentence structure like English.
In Korean, listen for the actor first, the target second, but wait for the end to hear the action.
`에` pinpoints a specific time for an action, but never use it with 'today', 'tomorrow', or 'yesterday'.
Use Noun + `까지` to mark the finish line of a journey or a deadline.
Use 도 to replace subject/object particles when adding something 'also' or 'too' to a list.
Attach `만` directly to any noun to express exclusivity or limitation in a positive/neutral way.
Use `부터` for time start points ("from 2pm"); use `에서` for location origins ("from Korea").
Attach 에게 or 한테 to a noun to show who is receiving an action, like giving or calling.
Use `-ㄴ다/는다` for verbs and keep adjectives in dictionary form to write objective facts or narrate life.
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:
Move beyond memorized phrases. Understand the rules so you can create original, correct sentences in any situation.
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.
Knowing grammar helps you parse complex sentences, understand nuance, and follow conversations even when speakers use advanced constructions.
Students who study grammar systematically reach fluency faster than those who rely on immersion alone. Structure accelerates learning.
Start with your CEFR level — from A0 Zero Point to C2 Mastery. Not sure? Begin at A0 and progress at your own pace.
Each chapter covers a grammar topic with clear explanations, pattern tables, and real-world example sentences.
Test your understanding with interactive exercises — fill-in-the-blank, multiple choice, sentence building, and translation practice.
Your progress is saved automatically. Complete chapters, unlock new levels, and watch your grammar mastery grow.
SubLearn covers 397 Korean grammar rules organized across 6 CEFR proficiency levels (from A1 to C2), spanning 78 structured chapters. Each rule includes clear explanations, real-world examples, and interactive practice exercises.
Our Korean grammar curriculum covers CEFR levels from A1 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 Korean 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 78 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.
Learning multiple languages? Check out our grammar guides for other languages:
We use essential cookies for sign-in, security, and preferences. Optional analytics starts only if you accept.
Add to your home screen for a faster, app-like experience
Fastest option
No past conversations yet.
AI-powered support
Would you like to create a support ticket? A human agent will help you.
You've used your free messages
Sign up for unlimited AI chatAI-powered — answers may not always be accurate