A-게 — in a ... manner, -ly

-게 functions as an adverb in a sentence and expresses the purpose, basis, degree, method of, or some thought about the action that follows. It corresponds to 'in a... manner' or '-ly' in English. The adverb form is made by adding -게 to the stems of adjectives.

Details

1. Although the adverbial form of an adjective is made by adding -게 to the stem, in the case of 많다 and 이르다, the forms 많이 and 일찍 are used in favor of 많게 and 이르게.

많다 一> 많이

A: 잘 먹겠습니다.

Thank you for the food (idiomatic).

B: 많이 드세요.

Please eat a lot.

이르다 一> 일찍

A: 늦어서 죄송합니다. I'm sorry for being late.

B: 내일은 일찍 오세요.

Please come early tomorrow.

2. There are also cases in which both the adverbial form -게 and a different form are used.

빠르다 一> 빠르게/빨리

비행기가 빠르게 지나가요.

The plane goes by fast.

이쪽으로 빨리 오세요.

Come this way quick.

적다 一> 적게/조금

소금은 적게 넣으세요.

Only a little salt, please.

커피 조금 더 드실래요?

Won't you have a little more coffee?

느리다 一> 느리게/천천히

시계가 느리게 가요.

My watch is slow.

천천히 드세요.

Please take your time eating (eat slowly)

Kimchi Reader

Expresses the purpose, method or though about the action that follows. It turns descriptive verb into adverb.