Korean Grammar

Hangul vowels are the foundational building blocks of the Korean writing system, introduced at the CEFR A1 level. The Korean alphabet, Hangul, was scientifically designed by King Sejong in 1443, and its vowel system reflects a philosophical approach to representing sounds through shapes. There are 21 vowels in total: 10 basic vowels and 11 compound vowels formed by combining basic ones.

Korean consonants form the other half of the Hangul writing system, essential knowledge at the CEFR A1 level. There are 19 consonants in total: 14 basic consonants and 5 double (tense) consonants. Understanding consonants is critical because their pronunciation changes depending on their position within a syllable block — a feature that makes Korean phonology distinctive.

Korean is unique among writing systems in that its letters are grouped into syllable blocks rather than written in a linear sequence. This is a fundamental CEFR A1 concept that unlocks reading and writing. Each block represents one syllable and consists of an initial consonant, a vowel, and an optional final consonant (called 받침, batchim).

Korean pronunciation rules govern how written text translates to spoken sound, a vital CEFR A1 skill. While Hangul is largely phonetic, several systematic sound changes occur when syllable blocks interact in connected speech. These rules explain why Korean sometimes sounds different from how it looks on paper.

Korean follows a Subject-Object-Verb (SOV) word order, which is fundamentally different from English (SVO). This is one of the first grammar concepts at the CEFR A1 level and shapes how every Korean sentence is constructed. The verb always comes at the end of the sentence, and particles mark the grammatical role of each word.

The subject particles 이 and 가 are among the first grammar particles learned at the CEFR A1 level. They mark the grammatical subject of a sentence — the person or thing performing the action or being described. The choice between 이 and 가 depends purely on phonetics: 이 follows consonant-ending nouns, while 가 follows vowel-ending nouns.

The topic particles 은 and 는 are fundamental markers at the CEFR A1 level that set the topic of a sentence — what the sentence is about. Like the subject particles, the choice is phonetic: 은 follows consonant-ending nouns, 는 follows vowel-ending nouns. The topic particle is one of the most distinctive features of Korean, with no direct equivalent in English.

The object particles 을 and 를 mark the direct object of a sentence — the thing that receives the action of the verb. This is a CEFR A1 concept essential for constructing complete Korean sentences. Like other particles, the choice is phonetic: 을 follows consonant-ending nouns, 를 follows vowel-ending nouns.

The location particles 에 and 에서 are essential CEFR A1 markers that indicate where something exists, happens, or where someone is going. The distinction between these two particles is critical in Korean and does not map neatly onto any single English preposition.

Korean personal pronouns function very differently from English pronouns, making this a key CEFR A1 concept. Pronouns vary significantly by formality level, and Korean speakers frequently omit them altogether when the referent is clear from context. In fact, overusing pronouns is one of the most common markers of non-native speech.

Korean has a three-way demonstrative system at the CEFR A1 level, unlike English which only distinguishes "this" and "that." The three demonstratives are 이 (this, near the speaker), 그 (that, near the listener or previously mentioned), and 저 (that over there, far from both speaker and listener). This system is used for things, places, people, and directions.

Korean has two number systems, and native Korean numbers (고유어 수사) are one of the first numerical concepts at the CEFR A1 level. These numbers go from 1 to 99 and are used for counting, telling age, and expressing hours. They originated from pure Korean vocabulary, as opposed to the Sino-Korean numbers borrowed from Chinese.

Sino-Korean numbers (한자어 수사) are the Chinese-origin number system used extensively in Korean, taught at the CEFR A1 level. These numbers have no upper limit and are used for dates, money, phone numbers, minutes, months, addresses, and mathematical operations.

Korean requires counter words (also called classifiers or unit nouns) whenever you count things, similar to how English uses "a piece of paper" or "a cup of coffee." This CEFR A1 concept is essential because you cannot simply say a number with a noun — a counter must mediate between them. Using the wrong counter or omitting it sounds ungrammatical.

Telling time in Korean uniquely combines both number systems: native Korean numbers for hours and Sino-Korean numbers for minutes. This CEFR A1 concept is essential for scheduling, making appointments, and daily communication. Beyond clock time, Korean has a rich set of time-related vocabulary for days, months, and general time references.

Understanding verb stems is the gateway to Korean conjugation, a fundamental CEFR A1 concept. Every Korean verb and adjective in dictionary form ends in -다. Removing -다 reveals the stem, which is the base to which all conjugation endings attach. Whether the stem ends in a vowel or consonant determines which conjugation pattern to use.

The polite ending -아/어요 (해요체, haeyo-che) is the most commonly used speech level in Korean and a core CEFR A1 concept. It is appropriate for most everyday interactions: speaking with strangers, colleagues, acquaintances, and anyone you are not extremely close to or in a highly formal situation with.

The formal polite speech level (합쇼체, hapsyo-che) uses the endings -ㅂ니다 and -습니다, making it the most formal everyday speech level in Korean at the CEFR A1 level. This level is used in news broadcasts, business presentations, military speech, formal ceremonies, and when addressing strangers respectfully.

The casual speech level (해체, hae-che), commonly known as 반말 (banmal), uses the same -아/어 conjugation as the polite level but drops the 요. This CEFR A1 concept is used exclusively with close friends of similar age, younger people, children, or in self-talk. Using casual speech with the wrong person is considered rude in Korean culture.

Korean has two primary negation patterns at the CEFR A1 level: 안 (choice-based negation, "don't/won't") and 못 (inability-based negation, "can't"). This distinction does not exist in English and is one of Korean's most elegant grammatical features. Choosing the right negation word conveys not just that something does not happen, but why.

The past tense in Korean is formed by adding -았/었 to the verb stem, following the same vowel harmony rules as the polite ending. This CEFR A1 concept allows you to talk about completed actions and past states. The past tense marker is inserted between the stem and the speech level ending, so you get forms like -았어요 (polite past) or -았습니다 (formal past).

The pattern -(으)ㄹ 거예요 expresses future tense and intention in Korean, a key CEFR A1 construction. It covers both "will do" (prediction) and "am going to do" (plan/intention). The form attaches to the verb stem and is followed by the copula 이다 in the appropriate speech level.

The pattern -고 싶다 expresses wanting to do something and is a fundamental CEFR A1 structure. It attaches directly to the verb stem with -고, followed by 싶다, which then conjugates for tense and speech level. This is how you say "I want to go," "I want to eat," and similar expressions.

The pattern -(으)ㄹ 수 있다 expresses ability and possibility in Korean, equivalent to "can" or "be able to." This CEFR A1 structure is formed using the future modifier -(으)ㄹ plus 수 (way/method) plus 있다 (to exist). Literally, it means "a way to do X exists." The negative form replaces 있다 with 없다: -(으)ㄹ 수 없다 (cannot).

In Korean, adjectives function as a type of verb called descriptive verbs (형용사). This CEFR A1 concept is fundamental because it means adjectives conjugate exactly like action verbs — they take tense markers, speech level endings, and negation patterns. There is no separate "to be" verb needed; 크다 means both "to be big" and simply "big."

The copula 이다 (to be) and its negative 아니다 (to not be) are essential CEFR A1 structures for equating nouns: "A is B" or "A is not B." Unlike English "is/am/are," 이다 attaches directly to the noun it follows, functioning almost like a particle. It is used exclusively with nouns — for adjective descriptions, use descriptive verbs instead.

있다 (to exist, to have) and 없다 (to not exist, to not have) are among the most frequently used words in Korean and a core CEFR A1 concept. They express existence, possession, and location — covering "there is," "I have," and "it is at" in a single verb pair.

Forming questions in Korean is remarkably simple at the CEFR A1 level: in polite speech (-아/어요), you simply raise your intonation at the end of the sentence. The sentence structure stays the same. Korean also has a rich set of question words (interrogatives) that stay in their natural position in the sentence rather than moving to the front as in English.

Korean greetings and set expressions are among the first things to learn at the CEFR A1 level. Many of these phrases are fixed forms that Korean speakers use daily without thinking about their grammatical structure. Some, like 안녕하세요, contain grammar you will study later (honorific -시), but they are used as complete units from day one.

The conjunctive ending -고 is the simplest way to connect clauses in Korean, equivalent to "and" or "and then." This CEFR A1 pattern attaches directly to the verb stem without any vowel harmony considerations — it works the same regardless of stem type. This makes it one of the easiest connective endings to learn and use.

The honorific suffix -(으)시 is one of the most important features of Korean's respect system, introduced at the CEFR A1 level. It is inserted into the verb stem to show respect for the subject of the sentence — the person performing the action. This is distinct from the speech level ending (polite -요, formal -ㅂ니다), which shows respect for the listener.

The progressive pattern -고 있다 expresses ongoing actions in Korean, similar to the English "-ing" form. This CEFR A2 structure combines the connective -고 with 있다 (to exist) to show that an action is currently in progress. It is formed by attaching -고 있다 to the verb stem, and 있다 then conjugates for tense and speech level.

The time expressions 전에 (before) and 후에 (after) allow you to sequence events in Korean, a key CEFR A2 pattern. When used with verbs, "before doing" is stem + 기 전에, and "after doing" is stem + (으)ㄴ 후에. They can also follow time nouns directly: 수업 전에 (before class), 수업 후에 (after class).

The connective ending -아/어서 expresses reason or cause in Korean, equivalent to "because" or "so." This CEFR A2 pattern follows the same vowel harmony rules as the polite ending: -아서 after ㅏ/ㅗ stems, -어서 after other vowels, and 해서 for 하다 verbs. The first clause states the reason, and the second clause states the result.

The grammatical ending -(으)니까 is one of the most common ways to express reason or cause in Korean. At the CEFR A2 level, learning this pattern will significantly expand your ability to explain why something happens, justify a suggestion, or give a reason for a request.

The conditional ending -(으)면 expresses "if" or "when" in Korean, making it one of the most versatile CEFR A2 patterns. It attaches to verb stems: -면 after vowel stems, -으면 after consonant stems. This single pattern covers hypothetical conditions, temporal conditions, and general truths.

The contrastive connector -지만 attaches to verb stems to express "but" or "although," a CEFR A2 pattern. It connects two clauses where the second contrasts with or contradicts the first. Unlike -고 (and), -지만 signals that what follows goes against the expectation set by the first clause.

The pattern -아/어 보다 expresses trying or experiencing something, a useful CEFR A2 structure. It combines the verb stem's -아/어 form with 보다 (to see/try). In present tense, it means "try doing"; in past tense (-아/어 봤다), it means "have tried/experienced." This is one of the most common patterns for recommendations and discussing life experiences.

The obligation pattern -아/어야 하다 or -아/어야 되다 expresses "must" or "have to" in Korean at the CEFR A2 level. The stem takes -아/어야 (same vowel harmony), followed by 하다 or 되다. Both mean essentially the same thing, with 되다 being slightly more colloquial. The negative "don't have to" is -지 않아도 되다, and "must not" is -(으)면 안 되다.

The permission pattern -아/어도 되다 means "may" or "is it okay to" in Korean, a practical CEFR A2 structure. It combines the concessive -아/어도 (even if) with 되다 (to become/be okay). In question form, it politely asks for permission. The negative 안 되다 denies permission: -아/어도 안 돼요 (you may not).

The ending -(으)ㄹ까요 is used to make suggestions ("shall we?") or wonder about something ("do you think?"), a key CEFR A2 pattern. It uses the future modifier -(으)ㄹ plus the question marker 까 and polite 요. It is the go-to form for polite suggestions in Korean.

Korean has multiple ways to say "let's" at the CEFR A2 level. The formal propositive -(으)ㅂ시다 is used in speeches, meetings, and formal situations. The casual -자 is used among friends. The polite level uses either -(으)ㄹ까요 (with question nuance) or simply -아/어요 with suggestive intonation.

The polite imperative -(으)세요 is the standard way to give polite commands and requests in Korean at the CEFR A2 level. It combines the honorific -(으)시 with the polite ending, creating a respectful command form. The negative imperative "please don't" is -지 마세요. More formal commands use -(으)십시오, while casual commands use -아/어.

The connective ending -(으)면서 expresses simultaneous actions ("while doing") at the CEFR A2 level. It requires the same subject for both clauses — one person doing two things at once. Vowel stems take -면서, consonant stems take -으면서. It can also express contrast when two states coexist in the same person.

Indirect quotation in Korean reports what someone said, asked, commanded, or suggested without using their exact words. This CEFR A2 pattern uses different endings depending on the sentence type: -다고 for statements, -냐고 for questions, -(으)라고 for commands, and -자고 for suggestions, all followed by 하다 (to say/do).

Noun modification (관형형) is a crucial CEFR A2 pattern that allows verbs and adjectives to describe nouns, similar to relative clauses in English. Korean places the modifier before the noun using special endings that vary by verb type and tense. This pattern is essential for creating complex, natural sentences.

Korean's giving and receiving system is more nuanced than English, reflecting the language's emphasis on social hierarchy. At the CEFR A2 level, you need to know 주다 (give), 받다 (receive), and 드리다 (give humbly to a superior). The auxiliary form -아/어 주다 means "do something as a favor for someone," one of the most common patterns in Korean.

Beyond the grammatical honorific -(으)시, Korean has a set of entirely different vocabulary items used when the subject is someone respected. This CEFR B1 concept covers special honorific verbs and nouns that replace their plain counterparts when speaking about elders, superiors, and customers.

Humble vocabulary (겸양어) complements honorific vocabulary by lowering the speaker's own status relative to the listener. At the CEFR B1 level, this concept covers special words and expressions used when referring to yourself or your actions when addressing superiors. While honorific vocabulary elevates the other person, humble vocabulary lowers yourself.

Korean passive voice is formed through two main methods at the CEFR B1 level: suffix passives (-이/히/리/기) and the -아/어지다 pattern. Not all verbs have passive forms, and the specific suffix depends on the verb. The agent (doer) is marked with 에게/한테 (by person) or 에 (by thing/natural force).

The causative voice at the CEFR B1 level expresses making, letting, or having someone do something. Korean forms causatives through suffixes (-이/히/리/기/우/추) or the analytical pattern -게 하다 (make/let do). Like passives, the suffix causatives are lexicalized and must be memorized for each verb.

The concessive ending -아/어도 means "even if" or "even though" at the CEFR B1 level. It expresses that the result remains the same regardless of the condition. Same vowel harmony as polite ending: -아도 after ㅏ/ㅗ, -어도 after others, 해도 for 하다. It differs from -지만 (but) in that -아/어도 specifically states the result is unaffected by the condition.

The pattern -(으)ㄹ 뿐만 아니라 expresses "not only... but also" in Korean at the CEFR B1 level. It adds emphasis by showing that something goes beyond what is expected. The related pattern -기도 하다 means "also does" or "sometimes does." Both patterns express addition or extent.

The retrospective marker -더- is a CEFR B1 concept that expresses the speaker's past observation or recollection. It indicates that the speaker personally witnessed or experienced something and is now reporting it. Key forms include -더라고요 (I noticed/observed that), -더니 (and then), and -던 (that was being/used to).

Degree and extent expressions at the CEFR B1 level allow you to quantify or compare the intensity of actions and states. Key patterns include -(으)ㄹ 정도로 (to the extent that), -(으)ㄹ 만큼 (as much as), and the adverbial -게 (in a ... manner). These patterns add precision and expressiveness to Korean sentences.

The pattern -(으)ㄹ 것 같다 expresses guesses, suppositions, and hedging in Korean at the CEFR B1 level. It literally means "it seems like it will" and is one of the most frequently used expressions in Korean conversation. Combined with different modifier forms, it covers past, present, and future guesses. Korean speakers use it extensively to soften statements and avoid sounding too direct.

The hearsay pattern is a contracted form of indirect quotation, used at the CEFR B1 level to report what you have heard without personal verification. -다고 해요 contracts to -대요, -라고 해요 contracts to -래요, and so on. These short forms are extremely common in everyday Korean conversation for sharing news, gossip, and secondhand information.

The pattern -(으)려고 expresses intention or purpose at the CEFR B1 level: "in order to" or "intending to." It connects two clauses where the first states the purpose and the second states the action taken to achieve it. -(으)려고 하다 as a standalone means "intend to / plan to."

Formal connective endings at the CEFR B2 level are used in written and formal Korean. They include -(으)므로 (because, formal), -(으)나 (but, formal), -거나 (or), and -(으)며 (and/while, formal). These replace their casual equivalents in academic writing, news, legal documents, and formal presentations.

Nominalization turns verbs into nouns at the CEFR B2 level, using two primary suffixes: -기 and -(으)ㅁ. -기 is more common in speech and represents actions or processes, while -(으)ㅁ is more formal and represents facts or states. Both are essential for constructing complex sentences and using many grammatical patterns.

Double negation at the CEFR B2 level creates strong affirmation through two negatives. The pattern -지 않을 수 없다 literally means "cannot not do" and expresses "cannot help but do" or "have no choice but to do." It is more emphatic than simple affirmation and is common in formal speech and writing.

The pattern -(으)ㄴ/는 반면(에) means "while" or "on the other hand" at the CEFR B2 level. It explicitly contrasts two aspects of the same or different subjects, presenting them as two sides of the same coin. It is more formal than -지만 and is common in essays, presentations, and analytical discussions.

The pattern -든(지) expresses "whether... or" and "regardless" at the CEFR B2 level. It indicates that the outcome is the same no matter what the condition is. Often used in pairs (X-든 Y-든) for "whether X or Y," and with 아무 for "any(thing/one/where)."

Reporting commands and requests at the CEFR B2 level uses specific quotation patterns. Commands are reported with -(으)라고 하다, negative commands with -지 말라고 하다, and requests (where the speaker benefits) with -달라고 하다. This distinction between -(으)라고 and -달라고 is uniquely Korean.

Beyond basic particles, Korean has nuanced particles at the CEFR B2 level that add subtle meaning: -마저 (even, last remaining), -조차 (even, surprisingly), -나마 (at least), -대로 (as/according to), and -만큼 (as much as). These particles elevate Korean expression beyond basic communication to nuanced, native-like speech.

At the CEFR B2 level, learners need to systematically understand how Korean derives causative and passive verbs from base forms using suffixes -이/히/리/기/우/구/추. Many of these derived forms are lexicalized and must be memorized. The same suffix can create either a causative or passive depending on the base verb.

Korean written style at the CEFR C1 level uses distinct endings and structures compared to spoken Korean. The plain style endings -다/-ㄴ다/-는다 replace polite endings in academic writing, news, and literature. Additional formal patterns like -(으)ㄴ/는 바 (regarding) and -는바 (as/since) appear in official and legal contexts.

Korean news reporting at the CEFR C1 level uses distinctive grammatical patterns for attribution, hedging, and objectivity. Journalists employ specific endings and constructions that differ from both conversational Korean and general formal writing. Understanding these patterns is essential for reading Korean news and achieving advanced comprehension.

At the CEFR C1 level, the advanced honorific system requires understanding the interplay between addressee honorifics (speech level) and referent honorifics (subject/object honorification). Korean speakers constantly calibrate these two dimensions simultaneously based on social relationships, context, and the topic of conversation.

Korean literary and archaic forms at the CEFR C1 level appear in poetry, classical literature, proverbs, and ceremonial language. While not used in everyday conversation, they enrich understanding of Korean culture and are encountered in literature, formal speeches, and historical dramas. Key forms include -도다 (exclamatory), -(으)리라 (will surely), and -거늘 (although, archaic).

Complex conjunctions at the CEFR C1 level connect ideas with nuance beyond simple "and," "but," or "because." These multi-part patterns express sophisticated relationships: -기는커녕 (far from), -다시피 (as you know/see), -(으)ㄹ수록 (the more... the more), and -(으)ㄴ/는 데다가 (in addition to).

Academic Korean at the CEFR C1 level employs a distinct register characterized by nominalized expressions, passive forms, hedging language, and formal connectors. Korean academic writing follows specific conventions for citation, argumentation, and structure that differ significantly from conversational Korean.

Business Korean at the CEFR C1 level combines formal speech levels, honorific vocabulary, humble expressions, and professional conventions. Korean corporate culture has specific language patterns for emails, meetings, phone calls, and presentations. Proper business Korean reflects hierarchy awareness and professional competence.

Korean regional dialects (방언) at the CEFR C2 level represent a rich dimension of the language. The four major dialect groups — Gyeongsang (경상도), Jeolla (전라도), Chungcheong (충청도), and Jeju (제주도) — differ significantly in intonation, vocabulary, and grammar. Jeju dialect is so distinct it is sometimes classified as a separate language.

Korean has seven distinct speech levels (화계) at the CEFR C2 level, though modern Korean primarily uses four. Understanding all seven provides insight into Korean's historical development and the full range of social expression. The levels from highest to lowest formality are: 하십시오체, 해요체, 하오체, 하게체, 해체 (반말), 해라체, and the plain style.

Classical Korean (고전 한국어 요소) at the CEFR C2 level covers historical linguistic features found in literature, old texts, and cultural expressions. Understanding Middle Korean features, archaic vocabulary, and Sino-Korean literary phrases enriches comprehension of Korean poetry, proverbs, and historical documents.

Sino-Korean (한자어) vocabulary comprises roughly 60% of the Korean lexicon, and at the CEFR C2 level, mastering advanced Sino-Korean compounds is essential for academic, legal, medical, and political discourse. Understanding the component Chinese characters (한자) aids comprehension and vocabulary building, as characters combine predictably to form new words.

Korean idioms (관용어) and proverbs (속담) at the CEFR C2 level embed deep cultural knowledge and add color to the language. Body-based idioms, four-character Chinese-origin expressions, and folk wisdom proverbs are used daily by native speakers. Understanding them is essential for appreciating humor, literature, and nuanced communication.

Historical Korean at the CEFR C2 level covers pre-modern linguistic features from Middle Korean (중세 한국어, roughly 15th-16th century) through Early Modern Korean. Key features include the extinct vowel ㆍ (아래아), archaic verb endings, historical particles, and the original forms found in texts like the Hunminjeongeum preface. Understanding historical Korean is essential for reading classical texts and appreciating the language's evolution.

Korean youth slang (신조어) and internet language at the CEFR C2 level represent the rapidly evolving cutting edge of the language. Korean generates new slang at an extraordinary pace through syllable-initial abbreviations, English loans, internet culture, and creative wordplay. Understanding current slang is essential for natural communication with younger Koreans and for comprehending social media, variety shows, and contemporary culture.