Let learn about "간다"

간다 : I'm off

[other expressions]

- 간다. (to younger people or friends)

- 갑니다. (honourific by '-ㅂ')

- 갈게. (to younger people or friends)

- 갈게요. (honourific by '-요')

[explanation]

* 가다 : go

* 간다 : present form of 가다

* 갑니다 : 가(the stem of 가다) + -ㅂ니다(an honourific descriptive verb ending suffix)

* 갈게 : 가(the stem of 가다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will); this means "I'm leaving right now" or "I'm off"

* 갈게요 : 가(the stem of 가다) + -ㄹ(a suffix makes a verb future tense) + -게(one's will) + -요(an honourific ending suffix); this means "I'm leaving right now" or "I'm off"