Let's learn about "커피로 할게요"

커피로 할게요 :  I’d like some coffee, please; Can I get a cup of coffee?; Just coffee, please; I just want some coffee; Coffee’s fine; Coffee will do

[other expressions]

- 커피로 할게. (to younger people or friends)

- 커피로 할게요. (honourific by '-요')

- 커피로 하겠습니다. (formal; more honourific by '스')

[explanations]

* 나 : I (non-honourific word)

* 자 : I (honourific word)

* -는 : a particle makes 나 / 저 subjective after a

word ends in a vowel

* 나는 / 저는 : these are omitted

If you want to emphasize what, use 은 or 는

If you want to emphasize who, use 이 or 가

* 커피 : coffee

* -으로 / -로 : A postpositional particle that indicates a thought about something(어떤 사물에 대하여 생각하는 바를 나타내는 조사)

* 하다 : (1) do (2) [=주문하다] order

* 할게 : 하(the stem of 하다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will)

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

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