本文主要讨论现代北京口语中的单音节程度副词“忒”与“倍儿”之间的相同及相异问题。全文详细地描述了现代北京口语中特有的单音节程度副词“忒”与“倍儿”的分布与用法，以语义特征、语法特征两方面的描述为主，其中“忒”常用的两种用法区分开来，本文以“忒1”和“忒2”进行分别描述与辨析。在此基础上，本文对“忒1”、“忒2”和“倍儿”三个单音节程度副词从语义、语法及其相关结构特点的角度进行比较分析，运用“语法化”理论从历时的角度进行了初步的语用认知分析，揭示了北京口语所蕴含的特有的文化底蕴，为学习和研究北京口语提供有效参考。

This thesis discusses the similarities and differences between two monosyllable degree adverbs”te” and ”beir” in modern Beijing spoken language. It provides a comprehensive description of these two monosyllable degree adverbs existing exclusively in modern Beijing spoken language in terms of distribution and usage, especially in the grammatical and semantic characteristics. “te”was analyzed separately due to its two common usages, marked by ”te” and ”tei/tui”in this thesis. In addition, the thesis takes a comparative view on the similarities and differences of the characteristics of grammar, semanteme and their interrelated forms among these three monosyllable degree adverbs. Grammaticalization theory is also applied to offer a diachronic explanatory in rudimental cognition of pragmatics. The thesis reveals the typical cultural essence implied in modern Beijing spoken language, and gives some effective references to those who learn and study it.