Probe to the Application of Theories in SLA in the English Teaching Activities o

摘 要：the richness of theories in the scope of second language acquisition，playing an important role in the language teaching activities.Among them，especially the critical period hypotheses，the“i+1 theory” as well as the inter language theory，on one hand，they would give some heuristic to the arrangement of teaching activities，on the another hand，the cohesion between the primary and middle school can be more reasonable.Through the exploration of these three assumptions in SLA，this article aims at synthesized effect of teaching activities through English teaching in primary school to those in the middle school.

关键词：critical period hypotheses; i+1 theory; inter-language theory; synthesized effect; primary and middle school

中图分类号：H31 文献标识码：A

文章编号：1009-0118（2012）09-0389-02

1.Introduction

From the autumn in 2002，the primary schools start to open the English classes all over the country.Generally the starting point of primary school English is from Grade three，and from these recent years，a large number of schools，especially the urban schools begin the primary school English education from the first year.（Li，2005）accordingly，the parents take the idea that the starting point of primary school English education should be the earlier and the better，thus join in the army of receiving guidance of English education even in the after school time.

2.Grasping the Essence of Language by the SLA Theory

2.1 The Critical Period Theory and Its Application in the Instruction

Studies show that the brain lateralization starts around two years old.(Deng，2007)This would last a long period that from the two years old to the adolescent period.As a human being，the biological genes would be expressed step by step，so does the cognitive competence that go along with it.At the same time，due to Vygotsky’s research that the development of language undergoes three phrases：the external speech，the egocentric speech and the internal speech.(Lu,2006)In view of Vygotsky，the external language provides the language environment in form of input to the language learners，and which would transfer to internal language.And the egocentric speech is the medical state in-between.As to the functions of them，the internal speech is the form that human being thinking，and the calculation of which in the brain can be transferred into external speech as output to the audience.Thus，the communication between the communicator and the audience can be realized.As to when this process would be started，this has a close relation to the cognitive competence of the language acquisitioned.Generally speaking，the language acquisition period was divided into three stages：the holophrastic stage，the two-word stage，the stage of three-word utterances and the fluent grammatical conversation stage .(Hu，2008)