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M2U1CulturalHeritageGrammar:“preposition+which/whom”Motto:Weneedculture,likeneedair.我们需要文化，就像需要空气一样。Ⅰ.LearningaimGetmorefamiliarwiththeusagesofrelativepronounsandrelativeadverbs.II.Self-learningguidanceandtestLearningguidanceTests1.Lead-inReviewwhatwehavelearnedaboutattributiveclausesintroducedbyrelativepronounsandrelativeadverbs.2.Grammar1.在限制性定语从句中，除了用常见的关系代词或关系副词来引导定语从句外，当关系代词which，whom在定语从句中作介词的宾语时，从句可由“介词+which/whom”引出。(1)当先行词是表事物的名词或代词时，可由“介词+which”引导从句。Thecity____whichshelivesisfaraway.(2)当先行词是表人的名词或代词时，可由“介词+whom”引导从句。Theman____whomyouspokeisateacher.2.“介词+关系代词”结构往往可以和关系副词互换。①when=表时间的介词(in,on,at,during等)+whichI’llneverforgetthedaywhenIjoinedtheleague._______________________________________________________________②where=表地点的介词(in,at,on,under等)+whichThisisthehousewhereIlivedtwoyearsago._______________________________________________________________③why=表原因的介词for+whichTherearemanyreasonswhypeopleliketraveling._______________________________________________________________3.在“介词+关系代词”结构中，如何准确地选择介词呢？(1)确定介词原则一：根据主从句之间的意思确定所需介词。This is the book_____ which I got the story.(2)确定介词原则二：根据从句动词、形容词等构成的短语确定所需介词。Thisroadwilltakemetotheplace____whichIbelong.Jackistheveryperson________Iwillturnwhenintrouble.(3)确定介词原则三：根据先行词确定所需介词。Thesongoftentakesmebacktothedaywhentheaccidenthappened.→Thesongoftentakesmebacktotheday_____whichtheaccidenthappened.4.限制性定语从句与非限制性定语从句的区别限制性定语从句非限制性定语从句与先行词的关系从句是先行词不可缺少的定语，如果省去，主句的意思就会不完整或不明确。从句只是对先行词的附加说明，如果省去,主句的意思仍然清楚或完整
