~나 can be added to the words 'where,' 'when,' and 'who' to mean 'everywhere,' 'every time,' and 'everyone.' Particles are usually not added to these words. For example:
어디 - where
어디나 - everywhere나는 한국에서 어디나 여행하고 싶어 - I (would) want to travel everywhere in Korea
우리는 동남아시아에 어디나 갈 거예요 - We will go everywhere in South East Asia
밥은 어디나 맛이 똑같아요 - Rice tastes the same everywhere언제 - when
언제나 - every time/always그녀는 언제나 늦게 와요 - She comes late every time
저는 언제나 똑같은 메뉴를 먹어요 - I always eat the same menu
저는 언제나 똑같은 시간에 일어나요 - I always wake up at the same time누구 - who
누구나 - everyone누구나 그 여자를 알아요 - Everybody knows that girl
누구나 우리 애기를 보고 싶어요 - Everybody wants to see our baby
누구나 한국을 좋아해요 - Everybody likes Korea

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LEARN KOREAN (한국어) [GRAMMAR] #1
RandomThis is book #1 for the Korean Language series. Try to understand all of the notes in this book before you proceed to the next one. Good luck ! This book contains Korean grammar. Try to understand it so that you can understand how to make a sentence...