Abstract：Based on the Hyland's structural and functional framework of 4-word bundles, this paper explores the structural and functional features between English majors' dissertations and international journal papers. The findings show that in general, the mean sentence length of students' dissertations was shorter than that of international journal papers. In structural aspect, students paid more attention to meaning correlation and explanation, while international scholars were more experienced and flexible on statement and abstract description. In functional aspect, students laid more emphasis on the description of environment, but not good at data mining and explanation and also personal standpoints. Based on real language material, the findings also have an implication for the improvement of EAP and academic communication ability.

Keyword：4-word bundles;corpus;structural and functional features;