2Hyland, F. Focusing on form., student engagement with teacher feedback[J]. System,2003 : 217-230.
3Kumaravadivelu, B. Language learning tasks: Teacher intention and learner interpretation[J]. ELT Journal, 1991: 98-107.
4Lightbown, P. Anniversary article: Classroom SLA research and second language teaching[J]. Applied Linguistics. 2000:431-462.
5Mennim, P. Rehearsed oral L2 output and reactive focus on form [J]. ELF Journal, 2003:130-138.
6Norris, J. M and Ortega, L. Effectiveness of L2 instruction: A research synthesis and quantitative meta-analysis[J]. Language Learning, 2000: 417-528.
7Schultz, R. Cultural differences in student and teacher perceptions concerning the role of grammar instruction and corrective feedback: USA-Colombia[J]. The Modern Language Journal. 2001 :244-258.
8Seedhouse, P. The case of the missing "no": The relationship between pedagogy and interaction[J]. Language Learning. 1997: 547-583.
9Seedhouse. P. Combining form and meaning[J]. ELT Journal.1997:336-344.
10Sheen, R. Focus on form-a myth-in-the-making? [J]. ELT Journal, 2003 : 57-3.