8[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. 被引量：1
9[5]Fraser, B. Types of English Discourse Markers [J]. Acta Linguistica Hungarica 38 (1988): 1-4, 19-33. 被引量：1
10[6]Fraser, B. Pragmatics Markers [J]. Pragmatics 6.2 (1996): 167-190. 被引量：1
