Traditionally,studies on disjuncts have been carried solely on the syntactic level,thinking that disjuncts haveonly commentary function and are optional elements in sentences.

• 外加状语在语篇建构中有着不可替代的作用,是不可或缺的重要语篇衔接手段,能够引导读者与作者一起参与语篇衔接与连贯的建构。