Based on the in - depth study and analysis of modern Tibetan syntactic structure, the relationship between the components of modern Tibetan phrase structure is analyzed in detail by using phrase structure grammar (PSG) . It finds that the structural ambiguity problems caused by structural formats such as the Modifier - Head,Subject - Predicate and Predicate - Object in modern Tibetan phrase structure. The paper uses the methods of computational linguistics to analyze three types of structural ambiguity and their corresponding ambiguous formats. It provides a favorable reference for the study and implementation of Tibetan language teaching,Tibetan - Chinese translation and Tibetan sentence analysis system.%在深入研究和分析现代藏语句法结构的基础上,用短语结构语法(PSG) 对现代藏语短语结构内部组成成分之间的关系进行详细的分析,从而发现现代藏语短语结构中的定中结构、主谓结构、述宾结构等存在结构格式导致的结构性歧义问题.为此,我们用计算语言学的研究方法,初步分析了三种结构歧义类型及其相应的歧义格式.这将对藏语语言教学、藏汉翻译和藏语句法分析系统的研究和实现等提供有利的参考.
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