[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"pubgrp:kg-ida:ko:en":3},{"type":4,"slug":5,"title":6,"level":7,"goal":8,"image_path":9,"is_locked":10,"is_daily_free":10,"formula":11,"gloss":8,"desc":14,"desc_audio":9,"voices":15,"examples":16,"fills":53,"choices":54},"grammar","kg-ida","Be (~be, is)","beginner","The Korean Copula 이다\u002F입니다 — saying \"A is B\"",null,false,[12,13],"Noun + 이다 (informal) \u002F 입니다 (polite formal)","Noun (with 받침) + 이에요\u002F입니다 | Noun (no 받침) + 예요\u002F입니다 (casual polite)","In English, \"to be\" is a linking verb that connects a subject to its identity or description: \"I am a teacher,\" \"She is tall.\" Korean works the same way, but English speakers often miss the crucial difference: **Korean treats identity statements as fundamentally different from other actions**. The verb `이다` doesn't describe an action—it defines what something IS.\n\nHere's the key insight: English blurs the line between \"I am\" (identity) and \"I am running\" (action). Korean keeps them completely separate. `이다` is exclusively for identity, state, and classification. When you say \"나는 학생이다\" (I am a student), you're literally saying the noun \"student\" IS the identity of \"I.\" There's no auxiliary verb hiding behind it; the entire meaning lives in `이다` alone.\n\nThe structure is deceptively simple because **Korean doesn't use a separate copula like English does—there's no hidden \"I is\"**. Instead, the subject noun directly combines with `이다`. Notice also: English adds articles (\"a,\" \"the\"), but Korean `이다` never does. \"나는 학생이다\" is \"I am a student,\" but literally: \"I [topic] student + is.\" The **bare noun + 이다** is the complete thought.\n\nFinally, **formality levels matter**: `이다` is raw\u002Finformal (dictionary form), `-다` is a written\u002Freported form, and `입니다` is the polite formal you'll hear in daily speech. These aren't interchangeable—they signal social context and register. English \"I am a teacher\" doesn't change based on politeness, but Korean does: \"선생님이에요\" (polite) vs. \"선생님이다\" (blunt). This grammaticalization of respect is a major 한국어 mindset difference.",[],[17,23,29,35,41,47],{"en":18,"ko":19,"ko_audio":20,"audio":21,"audios":22},"나는 학생입니다.","I am a student.","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Ftrans_audio\u002F6b6b9ce9-f673-452f-9f66-7312515e50d8.mp3","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Fblock_audio\u002Fbf836385-c2cc-4a20-ab00-99731022f552.mp3",{},{"en":24,"ko":25,"ko_audio":26,"audio":27,"audios":28},"이것은 책이에요.","This is a book.","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Ftrans_audio\u002F36b976c6-9ecd-49ea-942f-4855e203a99d.mp3","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Fblock_audio\u002F1a160327-c60c-4b95-bda9-0fe6b0f45208.mp3",{},{"en":30,"ko":31,"ko_audio":32,"audio":33,"audios":34},"그는 의사예요.","He is a doctor.","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Ftrans_audio\u002Fc3092165-9fe9-4c86-88e7-cb0bdd2be944.mp3","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Fblock_audio\u002Fa584d9ad-c768-4d70-a7cd-0ce9a8c3727f.mp3",{},{"en":36,"ko":37,"ko_audio":38,"audio":39,"audios":40},"우리 엄마는 회사원입니다.","My mom is an office worker.","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Ftrans_audio\u002F2b47b450-1fb9-4b91-9e93-f9da5b66c4f8.mp3","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Fblock_audio\u002F0c139ecf-0c19-451f-92ac-77ade62a19a3.mp3",{},{"en":42,"ko":43,"ko_audio":44,"audio":45,"audios":46},"그 음식은 맛있어요.","That food is delicious.","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Ftrans_audio\u002Fd26f8509-bb29-45b3-b3e8-618dc5ca2000.mp3","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Fblock_audio\u002F2285af58-f7cf-4073-946f-63d2ced705e5.mp3",{},{"en":48,"ko":49,"ko_audio":50,"audio":51,"audios":52},"오늘은 월요일이에요.","Today is Monday.","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Ftrans_audio\u002F41350706-fd49-44d3-ab90-7c6b503432b4.mp3","https:\u002F\u002Fpub-96bedcbbfd0f4e5d82c4505745cced9c.r2.dev\u002Fblock_audio\u002F960a1fe5-bba6-4744-9bf3-7e88d4787e87.mp3",{},[],[55,66,77],{"ko":56,"options":57},"Which sentence correctly uses the copula 이다\u002F입니다?",[58,60,62,64],{"t":59,"ok":10},"나는 키가 크입니다.",{"t":18,"ok":61},true,{"t":63,"ok":10},"나는 행복합니다.",{"t":65,"ok":10},"나는 빠르어요.",{"ko":67,"options":68},"Fill in the blank: '저는 한국 사람___.' (I am a Korean person.)",[69,71,73,75],{"t":70,"ok":10},"예요",{"t":72,"ok":61},"이에요",{"t":74,"ok":10},"어요",{"t":76,"ok":10},"합니다",{"ko":78,"options":79},"What is the key difference between using 이다 and using an adjective in Korean?",[80,82,84,86],{"t":81,"ok":10},"이다 is more polite than adjectives.",{"t":83,"ok":61},"이다 identifies (noun = noun), while adjectives describe qualities.",{"t":85,"ok":10},"이다 can only be used in formal speech.",{"t":87,"ok":10},"There is no difference; they are completely interchangeable."]