Using the Chinese Conjunctions 'function and meaning as a standard, we give a definition for conjunctions as following: Conjunctions are form words that connect the words, phrases, sentences, syntactic structure of the group, and it can show specific syntax and logic. 参照功能和意义相结合的标准,本文给连词作如下定义:连词是在词、短语、句子、句群等句法结构中起连接作用,并表示特定句法关系和逻辑关系的虚词。