This work was supported by the National Social Science Fund of China under grant number 13CYY088 (‘A multifeature/multidimensional analysis of register variation of English metadiscourse’). I would like to express my sincere gratitude to anonymous reviewers and editors for their many insightful comments on previous versions of this article, and to Weiwei Sun, Huan Peng, Xiaozhou Song, and Yuanming Ou for doing part of the corpus analysis.