1EllisR. Task-based Language andTeaching [M]. Oxford: OxfordUniversity Press, 2003.
2Krashen S. The Input Hypothesis:Issues and Implications [M].London: Longman, 1985.
3NunanD. Designing Tasks for theCommunicative Classroom [M].Cambridge: Cambridge UniversityPress, 1989.
4PicaT, Kanagy R, Falodun J.Choosing and Using CommunicativeTasks for Second LanguageInstluction[A]. In G.Crookes & S.Gass (eds.) Tasks and LanguageLearning: Integrating Theoryand Practice[C]. Clevedon:Multilingual Matters, 1993.
5SkehanP. A Framework forthe Implementation of Task-based Instruction [J]. AppliedLinguistics, 1996,( 17 ).
6SkehanP. A Cognitive Approachto Language Learning[M].Oxford:Oxford University Press, 1998.
7SwainM. The output hypothesis:just speaking and writing aren’ tenough [J]. Canadian ModernLanguage Review, 1 993,50(1): 158-164.
8SwainM,LapkinS.Problems in outputand the cognitive processes theygenerate: a step towards secondlanguage learning[J]. AppliedLinguistics, 1995, ( 1 6 ):371 -391.
9We11sG. Language Developmentin the Pre-school Years[M].Cambridge: Cambridge UniversityPress, 1985.
10Willis J. A Framework for Task-Based Learning [M], London:Longman, 1996.
5Nunan, D. Designing Tasks for the Communicative Clauroom[ M ] . Cambridge: Cambridge University Press, 1989.
6Skehan, P. A Framework for the Implementation of Task-based Instruc-don[J]. Applied Linguistics , 1996a 17:38 - 62.
7Skehan, P. A Cognitive Approach to Language Learning [ M ]. Oxford University Press, 1998.
8Willis, J. A Framework for Task-based Learning[M].London: Longman, 1996.
9Long, M H. A Role for Instruction in Second Language Acquisition:Task-based Language Training[J]. In K Hyltenstam and M Pienemann( eds). Modelling and Assessing Second language Acquisition . London: Muhilingual Matters, 1985:77- 100.
10Wells, G. Language Development in the Pre-school Years [ M ]. Cambridge: Cambridge University Press, 1985.
