Chinese interjections display both heterogeneity and homogeneity. They are heterogeneous in that they follow a development pathway from representing physiological acts to representing mental acts, then finally to representing conversational acts. They are homogeneous in that they all share three properties: signal of a sound, having no content meaning, and syntactic independence. These three properties have determined the peripheral status of interjections in the language system.
Ⅰ. 引言
Ⅱ. 前人研究
1) 叹词的命名
2) 叹词的分类
Ⅲ. 叹词的异质性：“语言化”
Ⅳ. 叹词的同质性
Ⅴ. 结论