定语放在名词或代词前，对其进行修饰的词或词组叫定语。一个漂亮的女孩。Abeautifulgirl.一本有用的书。Ausefulbook.一.定语从句的基本定义放在名词或代词后面，由关系代词或关系副词引导的修饰该名词或代词的从句叫定语从句。被修饰的词叫先行词。即：把修饰名词或代词的词换成一个句子，那么就叫做定语从句。句子修饰名词或代词，应该放在词的后面。翻译她是一个漂亮的女孩。Sheisabeautifulgirl.Sheisagirlwho/thatisbeautiful.我有一本有用的书。Ihaveausefulbook.Ihaveabookwhichisuseful.Thisismydaughter.Sheismoppingthefloor.Thisismydaughterwho/thatismoppingthefloorThegirlissinging.Sheisoneofmystudents.Thegirlwho/thatissingingisoneofmystudents.Thegirlisinred.SheiscalledShiQunni.Thegirlwho/thatisinrediscalledShiQunniThisisagirl.Ilikeherverymuch.Thisisthegirlwhom/that/whoIlikeverymuch.Thebabywho/thatismoppingthefloorismydaughter.先行词关系代词Thegirlwho/thatissingingisoneofmystudents.先行词关系代词Thegirlwho/thatisinrediscalledShiQunni.先行词关系代词Theboywho/thatisinblueiscalledShiZonglun先行词关系代词连接下列句子，并找出其中的关系代词或先行词。Thegirlisholdingapinkballooninherhand.SheiscalledWangHaiya.Thegirlwho/thatisholdingapinkballooninherhandiscalledWangHaiya.Thegirlisinblack.SheiscalledZhouMei.Thegirlwho/thatisinblackiscalledZhouMei.Conclusion先行词指人，关系代词用who或that或whom.连接句子并找出先行词和关系词It'sabeautifulbag.Itcostme100yuan.It'sabeautifulbagwhich/thatcostme100yuan.Thisismybook.Iboughtyesterday.Thisismybookwhich/thatIboughtyesterday.连接下列句子并找出其先行词和关系词。TheearthquakewasfeltinBeijing.Beijingismorethantwohundredkilometersaway.TheearthquakewasfeltinBeijingwhich/thatismorethantwohundredkilometersaway.Songtaoisalargecounty.ItliesinGuizhouprovince.Sontaoisalargecountywhich/thatliesinGuizhouprovinceConclusion先行词指物，关系词用which/that.连接句子ThegirliscalledYangFang.Hercoatispink.ThegirlwhosecoatispinkiscalledYangFang.YesterdayImetababy.Hishairiswhite.YesterdayImetababywhosehairiswhite.Thisisourschool.Itsfootballpitchisplastic.Thisisourschoolwhosefootballpitchisplastic.Thisisourdininghall.Itsfoodisdelicious.Thisisourdininghallwhosefoodisdelicious.Ihaveafriend.Hermotherisaworker.Ihaveafriendwhosemotherisaworker.Thebookismine.Itscolourisblue.Thebookwhosecolourisblueismine.二.关系词的分类1.关系代词2.关系副词关系代词在定语从句中作主语、宾语、表语和定语，常用的关系代词有：that,which,who,whom,whose关系副词在定语从句中作状语，常用的关系副词有：when,where,why三.关系代词的基本用法和注意点1.关系代词的基本用法关系代词指代的先行词充当从句的成分who人主语、宾语whom人宾语which物主语、宾语that人或物主语、宾语、表语whose人或物定语①who指人,在定语从句中作主语或宾语。作宾语时，可省略。Theman(who)Italkedwithisourteacher.Apersonwhostealsthingsiscalledathief.②whom指人,在定语从句中作宾语，可省略。Theman(whom)InoddedtoisMr.Li.③which指物，在定语从句中作主语或宾语。作宾语时，可省略。Thesearethetreeswhichwereplantedlastyear.Thisrecorder（which）heisusingismadeinJapan.Heistheman(that)Itoldyouabout.④that指人或物，在定语从句中作主语或宾语。作宾语时，可省略。Aplaneisamachinethatcanfly.⑤whose指人或物,在定语从句中作定语。不可省略。Weliveinahousewhosewindowsfacesouth.Thisisthelittlegirlwhoseparentswerekilledinthegreatearthquake.2.关系代词的用法注意点(1)that和which都可以指物，但以下5种情况只能用that不能用which。①当先行词中有人...
