Grammar · 15 min read

Korean Has 5 Words for 'And.' You're Probably Using the Wrong One.

와/과, 하고, (이)랑, 그리고, and -고. Five options, five different rules. Your textbook probably taught one or two. Here is the full picture.

You open a Korean textbook and find one translation for "and": 와/과. A few chapters later, 하고 appears with a shrug. Then 이랑/랑 shows up in a drama. Then 그리고 turns up at the beginning of a sentence. Then you hear 먹고 잤어요 in class and realize there is a fifth option nobody warned you about. Now you have five ways to say "and," and the only explanation you have been given is "formal vs. informal." That is only part of the story.

Three Categories, Not Five Random Words

Before comparing formality levels, there is a structural distinction that matters more. These five words fall into three categories, and each category follows completely different grammar rules.

The practical consequences: 그리고 cannot be stuck onto a noun (커피그리고 주스 is wrong). The three particles can never start a sentence on their own. And -고 only attaches to verbs and adjectives, never to nouns (사과고 바나나 is wrong).

The Formality Spectrum

Among the three particles, the choice comes down to register. From most formal to most casual:

The Attachment Rules

와/과 and (이)랑 both change form depending on whether the preceding noun ends in a consonant or a vowel. The rule for each pair is the mirror image of the other, which is where most learners stumble.

와 and 랑 both attach to vowel-ending nouns. 과 and 이랑 both attach to consonant-ending nouns. 하고 never changes, making it the easiest option for learners who are still unsure about syllable-final consonants.

"And" vs. "With": The Dual Meaning

All three particles carry two meanings: listing ("A and B") and accompaniment ("together with"). Context tells you which reading applies. The same particle, the same structure, two different meanings.

그리고 does not carry the "with" meaning. It only connects clauses and sentences, never an accompanying person or object.

그리고 and the "And Then" Effect

This mirrors how English "and" works. Korean does not mark this distinction with a different word. The type of verb drives the interpretation.

-고: The "And" That Lives Inside Verbs

This is the one most textbooks introduce late, but native speakers use constantly. -고 is a connective ending (연결 어미) that attaches to a verb or adjective stem and joins two clauses into one sentence. It is the verb-level equivalent of 그리고.

Same meaning, but -고 makes it one flowing sentence instead of two choppy ones. In natural Korean, -고 is far more common than 그리고 for connecting actions.

Two uses of -고

The difference is automatic: action verbs produce a sequential reading, descriptive verbs and adjectives produce a listing reading. You do not need to memorize which is which.

How -고 attaches

Unlike 와/과 and (이)랑, -고 never changes form. Drop the -다 from the dictionary form and add -고. That is it.

No consonant/vowel rules, no formality variants. -고 is the same in formal writing, casual speech, and everything in between.

-고 vs 그리고: when to use which

-고 in auxiliary verb constructions

-고 also appears in fixed patterns with auxiliary verbs. These are not "and" connections but grammatical constructions with their own meanings.

In these patterns, -고 is part of the grammar, not a connector meaning "and." 먹고 있어요 does not mean "I eat and exist." It means "I am eating."

-고 vs -아/어서: a critical distinction

Learners often confuse -고 with -아/어서, since both can connect two clauses. The difference: -고 is neutral ("and"), while -아/어서 carries a cause-and-effect meaning ("so, because").

The 함께 / 같이 Register Signal

There is a stylistic convention that fluent writers and speakers follow. 와/과 naturally pairs with 함께 (the formal word for "together"), while (이)랑 naturally pairs with 같이 (the casual word for "together"). Mixing these sends a register mismatch signal.

엄마랑 함께 and 엄마와 같이 are not ungrammatical, but they sound register-inconsistent. Match the formality of the particle to the formality of the adverb that follows.

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