1Merrian Webster. Merrian-Webster ' s Collegiate Dictionary (11^th ed.). 2003.
2Richards J C. , Platt J. and Platt H. Longman Dictionary of Language Teaching and Applied Linguistics. Addison Longman. China, 1998.
3.Oxford Concise Dictionary of Linguistics[M].上海:上海外语教育出版社,2000..
4Chomsky N. Aspects of the Theory of Syntax[M]. Cambridge, MA: MIT Press; 1965.
5Widdowson H G. Knowledge of Language and Ability for Use [J]. Applied Linguistics, 1989 Vol.10 (2): 128-137, 1.
6Chomsky N. Rules and Representations [M]. Oxford: Basil Blackwell, 1980.
7Hyrnes D. On Communicative Competence [M]. Philadephia,P. A:University of Pennsylvania Press, 1971a.
8Cazden C B. On Individual Differences in Language Competence and Performance [J]. Journalof Special Education, 1967 (1): 135-150.
9Hyrnes D. Competence and Performance in Linguistic Theory[A]. Huxley R, Ingrain E. Language Acquisition :Models and Methods[C]. London: Academic Press,1971b. 3--28.
10Huxley R, Ingrain E. Language Acquisition:Models and Methods [C]. London: Aeademic Press, 1971.