2Ellis,R.& Tomlinson,B.(1980).Teaching Secondary English[M].London:Longman Group Limited.129.
3Brown,D.(2001).Teaching by Principles:An Interactive Approach to Language Pedagogy[M].Beijing:Foreign Language Teaching and Research Press.159.
4Williams,M.& Burden,L.(2000).Psychology for Language Teachers:A Social Constructivist Approach[M].Beijing:Foreign Language Teaching and Research Press.39.
5Penny U.(2000).A Course in Language Teaching:Practice and Theory[M].Beijing:Foreign Language Teaching and Research Press.230.