Grammar · Negation
안 and -지 않아요, not
Pattern
안 + [verb] · [stem] + 지 않아요
안 goes directly in front of the verb: 안 가요, 안 매워요. For 하다 verbs built on a noun it goes between the two parts: 공부 안 해요. -지 않아요 attaches to the stem and means the same (가지 않아요), but sounds a little more careful and written.
The mistake to avoid
안 공부해요 is the classic mistake; 안 splits 공부해요 into 공부 안 해요. And 있어요 meaning 'there is' does not take 안, since 없어요 is its opposite.
Examples
Romanisation help
오늘은 학교에 안 가요.
oneureun hakgyoe an gayo.
I am not going to school today.
운동 안 해요.
undong an haeyo.
I do not exercise.
고기를 먹지 않아요.
gogireul meokji anayo.
I do not eat meat.
아침은 안 먹어요.
achimeun an meogeoyo.
I do not eat breakfast.