3[4]Erman, B. Pragmatic Expressions in English: A Study of you know, you seem and I mean in Face-to-face Conversation[M]. Stockholm Studies in English 69. Stockholm: Almqvist & Wiksell, 1987.
4[5]Fraser, B. Types of English Discourse Markers [J]. Acta Linguistica Hungarica 38 (1988): 1-4, 19-33.
5[6]Fraser, B. Pragmatics Markers [J]. Pragmatics 6.2 (1996): 167-190.
6[7]Gu, Yueguo. Towards a model of situated discourse analysis [A]. The semantics/pragmatics interface from different points of view,Vol. 1 [C]. 1999.
7[8]Hlker, K. Franzosisich: Partikelforschung. Lesikon der Romanistischen Linguistik, Vol V.1[M]. Tubingen: Niemeyer, 1991.
8[9]Jucker, A. & Yale Ziv. Discourse Markers: Introduction [A]. In A. Jucker & Yale Ziv (eds.) Discourse Markers: Descriptions and Theory[C]. Amsterdam: John Benjamins Publishing Company, 1998.
9[10]Lakoff, R. Questionable answers and answerable questions [A]. In Braj B. Kachru, Robert B. Lee, Yakov Malkiel, Angelina Pietrangeli and Sol Saporta (eds.). Issues in Linguistics. Papers in Honor of Henry and Renee Kahane[C]. Urbana: University of Illinois Press, 1973: 453-467.
10[11]Labov, W. & David Franshel. Therapeutic Discourse. Psychotherapy as Conversation[M]. New York: Academic Press, 1977.