아니다 (to not be) is the opposite of the word 이다 (to be), but they are used a little bit differently. Remember that 이다 is always attached directly to a noun. For example:
나는 선생님이다 - I am a teacher
나는 대학생이다 - I am a university studentHowever, when using 아니다, the particle ~이/가 is attached to the noun, and 아니다 is used as a separate word:
나는 선생님이 아니다 - I am not a teacher
나는 대학생이 아니다 - I am not a university studentBelow are some examples, with possible conjugations of 아니다. You have learned how to conjugate verbs and adjectives, but you still haven't learned how to conjugate 이다 and 아니다.
나는 선생님이 아니다 - I am not a teacher
나는 너의 친구가 아니다 - I am not your friend
나는 대학생이 아니다 - I am not a University student

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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...