411 REFERENCE · Wiktionary
-케
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
케
Korean
Pronunciation
Suffix
ko 하--게
Usage notes
See "Usage notes" at ko 하다 for more on the usage of this contraction.
Generally speaking, the adverb-deriving suffix can be contracted, but the sentence-final suffix cannot.