s“chunks”ofprefabricatedlanguagebecausetheseareeasiertoprocessandusethananequivalentnumberofindividualwordsthathavetobestrungtogetherviasyntacticalrules.(Lewis,1993)petenceisdeterminedbyalearner’essandadaptprefabricated“chunks”oflanguage.(Mattinger&DeCarrico,1992)lexicalitemsarecentraltolanguageuseandshouldbecentraltolanguageteaching:“Languageconsistsofgrammaticalisedlexis,notlexicalisedgrammar”(Lewis,1993)languageproductionisnotasyntacticrule-governedprocessbutisinsteadtheretrievaloflargerphrasalunitsfrommemory.(Sinclair,Nattinger,DeCarrico&Lewis)扩大词汇量的主要方式Incidentallearningfromcontextduringfreereadingisthemajormodeofvocabularyacquisitionduringtheschoolyears,andthevolumeofexperiencewithwrittenlanguage,prehensionability,isthemajordeterminantofvocabularygrowth.(Nagy,Herman,andAnderson,1985)
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