| Front | 에 |
| Back | It is attached to nouns, and followed by '있다'(to be) and '없다'(not to be).. Meaning: “in, at, on”.When used with verb 가다/오다 it means ‘To’"저는 도서관에 있어요."I am in the library. |
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| Front | V+ (으)ㄴ 후에 |
| Back | It means ‘after having done something’; used with the action verbs. The tense is expressed in the main (final) verb."수업이 끝난 후에 시장에 가자."Let’s go to the market after class. |
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| Front | 이에요/예요 |
| Back | The informal polite form of ‘-입니다’"내 책이에요." This is my book. |
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