What is -기?
The suffix '-기' attaches to the stem of a verb to turn the verb into a noun, often called a gerund or verbal noun. This allows the verb to be used as a subject or object in a sentence.
Usage and Nuance
'-기' is commonly used to talk about activities or states as concepts, like 'reading', 'studying', or 'exercising'. It often appears with particles like '가', '는', or '를' to mark the noun's grammatical role.
Common Collocations
- '하기 전에' (before doing): used to indicate an action that happens before another.
- '하기가 어렵다' (doing is difficult): expresses difficulty in performing an action.
- '재미있다' after '-기' noun: to say that doing something is fun.
Register and Politeness
'-기' is neutral and used in both formal and informal contexts. It is a grammatical tool rather than a word with inherent politeness.
Common Mistakes
Learners sometimes confuse '-기' with '-는 것'. Both nominalize verbs, but '-기' is often more abstract or used in set expressions, while '-는 것' can emphasize the ongoing action or specific instance. For example, '읽기' is 'reading' as a concept, while '읽는 것' can mean 'the act of reading' more concretely.