2Ashwell,T. 2000. Patterns of teacher response to student writing in a multi-draft composition classroom: Is content feedback followed by form feedback the best method? [ J]. Journal of Second Language Writing,9 (3) :227 - 257.
3Bitchener, J. & U. Knoch. 2008. The value of written corrective feed- back for migrant and international students [ J ]. Language Teaching Research, 12 ( 3 ) :409 - 431.
4Chandler,J. 2003. The efficacy of various kinds of error feedback for improvement in the accuracy and fluency of L2 student writing [ J ]. Journal of Second Language Writing, 12 (3) :267 - 296.
5Ellis, R. 2005. At the interface: Dynamic interactions of explicit and implicit knowledge [ J ]. Studies in Second Language Acquisition, 27 (2) :305 -352.
6Ellis, R. ,Y. Sheen,M. Murakami & H. Takashima. 2008. The effects of focused and unfocused written corrective feedback in an English as a foreign language context[ J ]. System,36 (3) :353 -371.
7Ferds,D. 1995. Can advanced ESL students be taught to correct their most serious and frequent errors? [ J]. CATESOL Journal,8( 1 ) :41 -62.
8Ferris,D. 1997. The influence of teacher commentary on student re- vision [ J ]. TESOL Quarterly,31 ( 2 ) :315 - 339.
9Fen'is, D. 2004. The "Grammar Correction" debate in L2 writing: Where are we,and where do we go from here? And what do we do in the meantime... ? [ J ]. Journal of Second Language Writing, 13 ( 1 ) :49 - 62.
10Ferris, D. & M. Helt. 2000. Was Truscott fight? New evidence on the effects of error correction in L2 writing classes [ R ]. Vancouver: A- merican Association of Applied Linguistics Conference.
