Abstract: The study on decision and processing of “BuShi” is very important in automatic modern Chinese processing. It will also benefit disambiguation in Sentence Category Analysis System (SCAS). By context, complexity of sentence, interrogative and the affection to the sentence, the decision rules and processing rules are put forward. The validity of the rules is also tested.

摘要： “不是”的用法判别和处理策略研究是计算机对现代汉语进行深层处理的必要内容，对句类分析系统中词汇语义模糊的消解有重要作用。本文对“不是”的各种用法及其分布情况进行了研究，并从上下文的关联、语句的复杂程度、是否属于特定问句、对语句的语义影响等方面提出了各种用法的判别和处理规则。同时，本文对这些规则进行了验证，结果表明这些规则在应用上达到了较为满意的水平。