5Odlin, Terence. Language Transfer---Cross - linguistic Influence in Language Learning [ M ]. Shanghai: Shanghai Foreign Languages Education Press,2001.
6Corder, S. P. Introducing Applied Linguistics [ M ]. Harmondsworth: Penguin Books, 1973:3 - 13.
7Richards J. A non - contrastive approach to error analysis [ J ]. ELT Journal, 1971,25 (3) :202 - 219.