Coherence is defined as an indwelling feature of text and a sense of unity more than connectedness.It is achieved through common means of text marker, lexical concurrence, text type and text pattern.

• 连贯也是篇章的内在特征，它不仅仅是意义的连接，更是意义一致性的体现，四种常见的连贯手段分别是篇章指示语、词汇连贯、篇章类型和篇章模式。