Let's learn about "그 사람인지 아직 확신이 안 서요"

그 사람인지 아직 확신이 안 서요 :I’m still not sure if he is the one; I’m not certain about getting married to him

[other expressions]

- 그 사람인지 아직 확신이 안 선다. (to younger people or friends)

- 그 사람인지 아직 확신이 안 서네. (to younger people or friends)

- 그 사람인지 아직 확신이 안 서. (to younger people or friends)

- 그 분인지 아직 확신이 안 서네요. (honourific by '-요')

- 그 분인지 아직 확신이 안 서요. (honourific by '-요')

- 그 분인지 아직 확신이 안 섭니다. (formal; more honourific by '스')

[explanations]

* 나 : I (non-honourific word to younger people or friends)

* 저 : I (honourific word to the elderly)

* -는 : a particle makes 나 / 저 subjective after a word ends in a vowel; when this omitted, the sentence is more natural

* 난 : a short form of 나는; this omitted

* 전 : a short form of 저는; this omitted

* 그 : that

* 사람 : human being; person (non-honourific word)

* 분 : human being; person (honourific word)

* 그 사람 / 그 분 : (1) he; she (2) him; her

* -인지 : whether ... or ... (this used after a word ends in a consonant)

* -ㄴ지 : whether ... or ... (this used after a word ends in a vowel)

* 확신 : [確信] [Pronunciation: 확씬] a conviction; a firm[confident] belief; assurance; [자신] confidence

* -ㄹ 확신이 없다 : be not confident of

* 확신은 없다 = 확신이 안 서다 : I am not certain

- 확신을 갖다 : have confidence / feel sure 

- 확신을 얻다 : gain confidence

- 확신을 주다 : carry conviction

- 성공할 확신이 없다 be not confident of success

- 이 일은 확신을 갖고 말씀드릴 수 있습니다 : This much I can say with confidence[certainty]

- 그가 훌륭한 사람이라는 확신을 굳혔다 : My conviction that he is an admirable man was confirmed

* 확신하다 believe firmly; be[feel] confident ; feel certain ; have a firm belief

* 확신시키다 : convince

- …임을 완전히 확신하고 : in the full assurance that ‥

- 나는 그의 결백함을 확신하고 있다 : I am convinced of[believe firmly in] his innocence. / I am convinced that he is innocent.

- 너는 성공을 확신하고 있니 : Are you sure of success? / Are you sure (that) you will succeed?

- 그는 시험에 합격되리라고 확신하고 있었다  :He hadn't a doubt in the world[was absolutely sure] that he would pass the examination

* -이 : a particle makes 확신 the topic of the sentence after a word ends in a consonant

* 안 : this makes a verb negative meaning

* 서다 : (1) stand; take a stand (2) stand up; rise (3) stop; halt (4) [결심이 서다•확신이 서다] be determined / be resolved / make up one's mind / make a resolve [resolution] / decide

* 안 서다 : not decide; be not determined

* 확신이 안 서다 : be unsure

* 선다 : present form of 서다

* 서 : 서(the stem of 서다; 서 + -어 contracted into 서) + -어(a non-honourific descriptive verb ending suffix)

* 섭니다 : 서(the stem of 서다; 서 + -ㅂ니다 contracted into 섭니다) + -ㅂ니다(an honourific descriptive verb ending suffix)

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

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

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