1Ayoun,D,M.R.Salaberry. Acquisition of English tense-aspect morphology by advanced French instructed learners[J].LANGUAGE LEARNING,2008,(03):555-595.
2Bardovi-Harlig K. The relationship of form and meaning:A crosssectional study of tense and aspect in the interlanguage of learners of English as a second language[J].Appl Psycholinguistics,1992,(01):253-278.
3Bardovi-Harlig,K,D.Reynolds. The role of lexical aspect in the acquisition of tense and aspect[J].TESOL Quarterly,1995,(01):107-131.
4Bardovi-Harlig K. Tense and Aspect in Second Language Acquisition:Form,Meaning,and Use[M].Oxford:Blackwell Publishing,2000.
5Bayley,R. Variation Theory and Second Language Learning:Linguistic and Social Constraints on Interlanguage Tense Marking[D].Standford University,1991.
6Bhat,D.N.S. The Prominence of Tense,Aspect and Mood[M].Philadelphia:John Benjamins Publishing Company,1999.
7Comrie B. Aspect[M].Cambridge:Cambridge University Press,1976.
8Fareidoust,M.A,F.Sadighi,M.Saadat. Investigating the primacy of aspect in the performance of Iranian EFL learners[J].The Iranian EFL Journal,2011,(04):203-219.
9Finger,I. The role of explicit instruction in the acquisition of the present perfect[J].RBLA Belo Horizonte,2010,(04):837-858.
10Jacobs R. English Syntax:A Grammar for Language Professionals[M].Oxford:Oxford University Press,1995.
5Andersen, R. & Y. Shirai. 1994. Discourse motivations for some cog- nitive acquisition principles[ J]. Studies in Second Language Acqui- sition, ( 16 ) : 133 - 156.
6Bardovi-Harlig, K. 1999. From morpheme studies to temporal seman- tics[ J]. Studies in Second Language Acquisition,21 (4) :341 -382.
7Bardovi-Harlig, K. 2000. Tense and Aspect in Second Language Ac- quisition : Form, Meaning,and Use [ M ]. Oxford : Blackwell.
8Bardovi-Harlig, K. & D. Reynolds. 1995. The role of lexical aspect in the acquisition of tense and aspect [ J ]. TESOL Quarterly, 29 ( 1 ) : 107 - 131.
9Bayley, R. 1991. Variation Theory and Second Language Learning : Linguistic and Social Constraints on Interlanguage Tense Marking [D]. Unpublished Doctoral Dissertation. Standford: Standford Uni- versity.
10Bayley, R. 1994. Interlanguage variation and the quantitative para- digm : Past-tense marking in Chinese-English [ A ]. In Tarone, E. , S. Gass & A. Cohen ( eds. ). Research Methodology in Second-Lan- guage Acquisition [ C ]. Hillsdale: Lawrence Erlbaum.