1Bernstein,Basil,Pedagogy,Symbolic Control and Identity:Theory,Research and Critique[M].London:Taylor and Francis,1996:46,183.
2Liu Yanfen & Zhao Yuqin,A Study of Teacher Talk in Interactions inEnglish Classes[J].Chinese Journal of Applied Linguistics (Bimonthly),2010,33:76-86.
3Sinclair,J.M. & M.Coulthard,Towards an Analysis of Discourse[M].London:0PU,1975:723-735.
4Sacks et al. A Simplest Systematics for the Organition of Turn - taking for Conversation [ J ]. Language, 1974.
