수량자 - 기사 및 음수 수량자

used when we want to talk about a person or thing for the first time or when other people may not know who or what they are

하나의

used before a singular noun that starts with a vowel sound, when we are not talking about a specific person or thing

하나의

used when referring to a person or thing that was previously mentioned or one that is identified easily

그

used to show that there is none or almost none of something

없다

not any of the members of a group of people or things

아무도

one or some of a thing or number of things, however large or small

어떤

used to indicate the absence or lack of something

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