摘要
“除非”的用法有三类八式。A类是判断；B类是推理；B1、B2是两种完整形式的推理，B3、B4是省略式，B5、B6是换位、换质；C类是证明。这八种用法，只有从逻辑上来划分，才能理解；否则，就会产生认识上的偏差。
Abstract : There are three categories and eight types in the usage of the term ' unless.' Categony A is judger-ment, category B infe rence, category C proof. Category B contains six types.-Bj and 62 are two intact reasoning, B3 and B4 alliptic type, B5 and B6 contrapositions. Only classified logically, can this eight kinds of proofs be under stood. Otherwise, they may be misundertood.
出处
《商丘师范学院学报》
CAS
2001年第5期84-86,共3页
Journal of Shangqiu Normal University
关键词
语言
逻辑
"除非"
逻辑意义
Key wrods : language
logic
unless
logical meaning
