第二章和第三章主要从静态和动态的角度来分析宁津方言词汇的语法特点与演变规律，是全文的重点所在。
Chapter 2 and Chapter 3 are the emphases of the text, which analyze the grammar characteristic and evolution law of its vocabulary from the static and the dynamic aspects.
“是”从代词演变为断定系词，进而成为焦点标记，是语法界普遍接受的事实。
It is generally accepted that Shi evolved from a pronoun to a assertive copular and to a focus marker.
通过蒙古语语音、语法、词汇演变分析，探求汉语言文化对蒙古族语言文化的影响和作用。
I also discuss how Chinese language and culture influences Mongolian language and culture throughout analysis of sound, grammatical and lexical changes.
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