3Archakis, A. 2001. On discourse markers: Evidence from modern Greek [J]. Journal of Pragmatics 33: 1235-1261.
4Blakemore, D. 1993. The relevance of reformulations [J]. Language and Literature 2 (2): 101- 120.
5Blakemore, D. 2002. Relevance and Linguistic Meaning: The Semantics and Pragmatics of Discourse Markers [M]. Cambridge: CUP.
6Cuenca, M. 2003. Two ways to reformulate: A contrastive analysis of reformulation markers[J]. Journal of Pragmatics 35: 1069-1093.
7Matsui, T. 2002. Semantics and pragmatics of a Japanese discourse marker dakara (so/in other words) : A unitary account [J]. Journal of Pragmatics 34: 867-891.
8Murillo, S. 2004. A relevance reassessment of reformulation markers[J]. Journal of Pragmatics 36: 2059-2068.
9Quirk, R. et al. 1985. A Comprehensive Grammar of the English Language [M]. London: Longman.