This is a study is about analyzing three representative Korean conditional connectives, ‘geodeun, eumyun, and eoya’ by using Genre-Text-Grammar. Research is focused on analyzing the actual usage of connectives, which can be rephrased as usage specificity, in the Korean corpus based on real-life text. Korean conditional connectives ‘geodeun, eumyun, and eoya’ can be differentiated clearly with syntax. Though, the difference became vague when they are compared with semantics. ‘Eoya’ has meaning of ‘mandatory condition’, while other two, ‘geodeun’ and ‘eumyun’, have identical meaning: simple ‘condition’ of the following clause. Genre-Text-Grammar was used to find the difference between three condition connectives. In general Genre-Text-Grammar, grammar is used to show the characteristic of certain genre and text, though here it was reversed. Genre and text were used to show the usage specificity of each conditional connectives. The result showed, there was a difference in between the usage of three conditional connectives. ‘Geodeun’ is mostly use in spoken language, fiction genre, novel. It is usually used in an imperative sentences where commanding others to do a certain action. ‘Eumyun’ is commonly used in written language, explanation genre, newspaper article, and declarative sentences when explaining. ‘Eoya’ is usually used in written language, explanation genre, newspaper and magazine article, declarative sentence when giving an opinion. This research only shows ‘tendency’ of usage of Korean conditional connectives. Though, it is still meaningful, because it can provide most commonly used example of each connectives to KFL students, who don''t have an insight to Korean grammar. The analysis of this research can be a guide when making example sentences and activities which allows KFL learners to naturally understand when and how to use each connectives in actual sentences.