话语序列是语篇中由前后相连的句子或语段构成的有意义的语言单位。在言语交际过程中 ,句子或语段是通过语义或语用关系形成话语序列进而构成更大的语言单位的。话语序列的连贯关系体现了语篇在微观层面上的连贯性。对话语序列的连贯关系进行研究的目的在于揭示语篇在微观层面上的结构特征和连贯语篇的建构机制 A discourse sequence is a meaningful unit of speech made up of consecutive sentences or phrases in a discourse. In the process of verbal communication, sentences or phrases constitute a larger linguistic unit through the formation of discourse sequences through semantic or pragmatic relations. The coherent relationship between discourse sequences reflects the coherence of discourse at the micro level. The purpose of the study of the coherence of discourse sequences is to reveal the structural features of discourse at the micro level and the construction mechanism of coherent discourse