Let's learn about "다 쉽지 않아"

(모두) 다 쉽지 않아 : They’re all not easy

[other expressions]

- (모두) 다 쉽지 않다. (to younger people or friends)

- (모두) 다 쉽지 않네. (to younger people or friends)

- (모두) 다 쉽지 않아. (to younger people or friends)

- (모두) 다 쉽지 않네요. (honourific by ‘-요’)

- (모두) 다 쉽지 않아요. (honourific by ‘-요’)

- (모두) 다 쉽지 않습니다. (formal; more honourific by ‘-스’)

[explanations]

* 모두 = 다 = 모두 다 : all; everything

* 쉬운 : easy

* 쉽다 : be easy

[ㅂ 불규칙 규칙(V irregular rule)]

(1) the ㅂ of 쉽다 is not 'B' sound but 'V' sound and V consists of ㅂ + 옛이응  ‘ㆁ’. these days  V sound changed into '우' for easy pronunciation

- See : https://m.blog.naver.com/nurisejong/221050681781

(2) 쉬운: an adjective form of 쉽다; this is from 부끄러 + ㅂ(V sound consists of ㅂ + 옛이응  ‘ㆁ’; this changed into '우') + ㄴ(a suffix makes a verb into an adjective)

(3) 쉬워 : 쉽(the stem of 쉽다; ㅂ(V sound) changed into 우) + -어(a non-honourific descriptive verb ending suffix)

* 쉽지 : 쉽(the stem of 쉽다) + -지(a connection suffix makes a verb negative meaning before a verb means negative nuance)

* 않다 : [Pronunciation: 안타] be not

* 않습니다 : 않(the stem of 않다) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix by ‘-ㅂ’)

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

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

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