5Wary,A.2000.Formulaic sequences in second language teaching:principle and practice.Applied Linguistics,21/4,463-489.
6Wray,A.Fomulaic Language and the Lexicon[M].Cambridge University Press,2002.
7Nattinger J R & DeCarrio J S.Lexical Phrases and Language teaching[M].Oxford:Oxford University Press,1999.
8Ellis,R.The Study of Second Language Acquisition[M].Oxford:Oxford Unviersity Press,1994:85.
9Wray,A.& Perkins,M.R.The Function of Formulaic Language:An integrated Model[J].Language and Communication,2000(20):1-28.
10Brown,P.& S.Levinson.Universals Language Usage:Politeness Phenomenon in E.Goody (ed.) Questions and Politeness:Strategies in Social Interaction[C].1978.
