Let's learn about "지각하다"

나 오늘 지각했어 : I'm late (for class) today

[other expressions]

- 나 오늘 지각했다. (to younger people or friends)

- 나 오늘 지각했네. (to younger people or friends)

- 나 오늘 지각했어.. (to younger people or friends)

- 저 오늘 지각했네요. (honourific by '-요')

- 저 오늘 지각했어요. (honourific by '-요')

- 저 오늘 지각했습니다. (formal; more honourific by '스')

[explanations]

* 나 : I (non-honourific word)

* 저 : I (honourific word)

* -는 : a particle makes 나 / 저 subjective after a word ends in a vowel; this omitted

* 오늘 : today

* 지각 : (1) [high long tone on ‘지’] perception; consciousness; sensation (2) [low long tone on ‘지’] the (earth's) crust; the lithosphere (3) [low short tone on ‘지’] lateness; being late; coming late; tardiness in the sentence

* 지각하다 : (1) [high long tone on ‘지’ ] percept; be conscious of (2) [low short tone on ‘지’] be late

* 지각했다 : past tense of 지각하다 by '-었-'

* 지각했습니다 : 지각했(the stem of 지각했다) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix by '-ㅂ')

* a verb + -다 / -네 / -어 : a non-honourific descriptive verb ending suffix

* a verb + -네 / -어 + -요 : an honourific verb ending suffix

* a verb + -습니다 / -ㅂ니다 : an honourific descriptive verb ending suffix by '스' / '-ㅂ'