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Module5Unit3ScienceversusnatureGrammarandusageVerb-edformThoughtsonthedesign:作为分词板块的最后一个单元，采用比较直接的方法，从现在分词的用法回顾导入课题，首先是考虑到知识的延续性，同时动词的现在分词形式在进一步学习动词的过去分词的过程中起到了不可忽视的对比作用。再者，考虑到学生在高中英语学习的过程中，对于分词已经有了一定程度的了解，因此在教学中，主要采用启发式回顾、对比、总结，然后操练的方式，让学生熟悉并能运用过去分词在句中所充当的定语、表语、宾补、状语等成分。Teachingaims:Afterlearning,studentswillbeableto1.knowdifferentfunctionsofverb-edformsaspredicate,attribute,adverborobjectcomplement.2.thepassivemeaningsandpastmeaningsofverb-edforms;3.relationshipbetweentheverbanditsunderstoodsubject;4.tellthedifferencesandsimilaritiesbetweentheverb-ingformandtheverb-edform;5.analyzethesituationinwhichtouseverb-ingformsorverb-edforms;6.useverb-edformstoexpresstime,reasonandconditionandsoon.Teachingprocedures:Step1LeadinUsesomesentenceorphrasesamplestohelpreviewtheusageofverb-ingingeneral.Step2Functionoftheverb-edformaspredicative1.Presentsentencescontainingtheverb-edform,askingstudentstofindoutwhatfunctionsitservesindifferentsentences.2.Maketheconclusion:verb-edformscanbeusedaspredicative,Step3Functionoftheverb-edformasobjectcomplement1.Presentsentencescontainingtheverb-edform,askingstudentstofindoutwhat1functionsitservesindifferentsentences.2.Maketheconclusion:verb-edformscanbeusedasobjectcomplement.Step4Functionoftheverb-edasattribute1.Presentsentencescontainingtheverb-edform,askingstudentstofindoutwhatfunctionsitservesindifferentsentences.2.Usesomeexamplestohelpstudentsunderstandthefollowingpoints:(1)Verb-edformsofvthavebothpassivemeaningandpastmeaning;Verb-edformsofvionlyhavepastmeaning.(2)Asingleverb-edwordisputbeforenouns;verb-edphrasesareputbehindnouns.(3)Averb-edcanbepartofacompoundwithanadv.orn.beforeit;Step5Theverb-edformasadverbial1.Presentsentencescontainingtheverb-edform,askingstudentstofindoutwhatfunctionsitservesindifferentsentences.2.Introduceverb-formsusedasadverbialmodifiertoexpresstime,reasonandconditionandsoon.3.Leadstudentstothinkabouttherelationshipbetweentheverbanditsunderstoodsubjectinthiskindofexpressionbycomparison.4.Introduceverb-edformsusedwithconjunctionslikeif,unless,etc.5.Givesomesentencesforthemtopractise.Step6Tellthedifferencesbetweenverb-edandverbingforms1.Usesomesentencesorphrasestotellthedifferences.2.Accordingtothisandwhathasbeenlearned,helpstudentstosummarizedifferentsituationstouseverb-ingorverb-edforms..Step7Drills1.Askstudentstodosomemultiplechoices.2.Checktheanswerstogether.Step8SummaryDoasimplesummaryofwhattopayattentiontoaccordingtotheirperformanceindoingmultiplechoices.2