book review of the second edition of theories in second language acquisition： an introduction

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1、BookReviewoftheSecondEditionofTheoriesinSecondLanguageAcquisition：AnIntroduction　　ThesecondeditionofTheoriesinSecondLanguageAcquisitionisanidealintroductorytextforundergraduateandgraduatestudentsinSLAandlanguageteaching.Itwasbuiltonthestrengthsofthefirsteditionbysurveyingthemajortheorie

2、scurrentlyusedinsecondlanguageacquisitionresearch.　　Eachchapterfocusesonasingletheory，writtenbyaleadingscholarinthefieldinaneasy-to-followstyle：abasicfoundationaldescriptionofthetheory，relevantdataorresearchmodelsusedwiththistheory，commonmisunderstandings，andasamplestudyfromthefieldtosh

3、owthetheoryinpractice.　　Chapter1waswrittenbyVanPattenandWilliams.Theydistinguishbasicconceptsintheorystudyand10observationsthatneedtobeexplainedbySLAtheories，aswellasthecontroversyabouttherolesofexplicitandimplicitlearningandknowledgeinSLA.　　Chapter2reviewsearlytheoriesinSLA：behaviorism

4、andStephenKrashen’monitortheory.　　LydiaWhitewroteChapter3.Shediscussedstudyonthecompetenceofinterlanguageofsecondlanguagelearnersfromtheperspectiveofuniversalgrammar.Itexplainsobservation1，2，3，6and7.　　Chapter4bringsafunctionalapproachtoSLA：theconcept-orientedapproach（COA）.COAtalksabouth

5、owlanguagelearnersusedifferentwaystoexpresstheconceptstheywanttoexpress.Itcanexplainobservation4and9.　　InChapter5NickC.EllisandStefanieWulffintroducedthe“usage-based”approachtoSLA：associativecognitivecreed（ACC）.ACCthinksthatlanguagesystemusingdifferentlanguagetocharacterizeandshareflowo

6、fsemantics.Itcanexplainobservation2，3，4，6，7，8and9.　　InChapter6RobertDeKeyserintroducedskillacquisitiontheory（SAT）.SATexplainshowpeoplegothroughthreestagesinsecondlanguagelearning：declarative，proceduralandautomationstage.Itexplainsobservation4and5.　　Chapter7touchesuponthetheoryofinputpro

7、cessinginadultSLA（IP）byBillVanPatten.IPanswersthreefundamentalquestionsthatinvolvetheassumptionthatanintegralpartoflanguageacquisitionismakingform-meaningconnectionsduringcomprehension.Itexplainsobservation1，4，7，9and10.　　InChapter8MichaelT.Ullmandealtwiththedeclarative/procedur