Let's learn about "내가 저녁 사줄게"

내가 저녁 사 줄게 : I'll treat you to dinner

[other expressions]

- 내가 저녁 살게. (to younger people or friends)

- 제가 저녁 살게요. (honourific by '-요')

- 제가 저녁 사겠습니다. (formal; more honourific by '스')

- 내가 저녁 사 줄게. (to younger people or friends)

- 제가 저녁 사 드릴게요. (honourific by '-요')

- 제가 저녁 사 드리겠습니다. (formal; more honourific by '스')

[explanations]

* 내 : I (non-honourific word)

* 제 : I (honourific word)

* -가 : a particle makes 내 / 가 subjective after a word ends in a vowel; -가 is used to emphasize 내 / 가 stronger

* 사다 : buy

* 사 : 사(the stem of 사다; 사 + -아 contracted into 사) + -아(a connection suffix between two verbs)

* 주다 : give (non-honourific word)

* 드리다 : give (honourific word)

* 사 주다 = 사주다 / 사 드리다 : do something with effort or money

* 살게 : 사(the stem of 사다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will)

* 살게요 : 사(the stem of 사다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will) + -요(an honourific verb ending suffix)

* 사겠습니다 : 사(the stem of 사다) + -겠(one's will) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix)

* 줄게 : 주(the stem of 주다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will)

* 드릴게요 : 드리(the stem of 드리다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will) + -요(an honourific verb ending suffix)

* 드리겠습니다 : 드리(the stem of 드리다) + -겠(one's will) + -스(a suffix makes a verb more honourific) + -ㅂ니다(an honourific descriptive verb ending suffix)