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。TheboywhoisreadingisTom.先行词关系代词Hospitalisaplacewhereadoctorworks.先行词关系副词二.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.(3)Heisthekindperson.Ihaveeverworkedwithhim.(4)Thisisthebestfilm.Ihaveeverseenthisfilm.HeisthekindpersonwhoIhaveeverworkedwith.whomthatØThisisthebestfilmthatIhaveeverseen.Ø1.Thegirl__________isstandingnexttoourteachernexttoourteacherisherdaughter.isherdaughter.2.Thegirl_________________ourteacheristalkingwith2.Thegirl_________________ourteacheristalkingwithisafamoussinger.isafamoussinger.3.Thegirl________motherisateachercanspeak3.Thegirl________motherisateachercanspeakEnglishEnglishverywell.verywell.4.Ican’tfindthebook____________isborrowedfrom4.Ican’tfindthebook____________isborrowedfromthelibrary.thelibrary.5.Ican’tfindthebook________________youlenttome.5.Ican’tfindthebook________________youlenttome.who/that(who/whom/that)(who/whom/that)whosewhosewhich/thatwhich/that(that/which)(that/which)巩固练习：2.用适当的关系词填空五.关系副词when,where和why的用法关系副词指代的先行词充当从句的成分when表时间的名词/名词词组时间状语where表地点的名词/名词词组地点状语why表原因的名词原因状语用关系副词when时，先行词指时间，when在定语从句中作时间状语，when可换成“介词+关系代词”。如：Istillrememberthedaywhen(=onwhich)IfirstcametoNanjing.Myfatherwasbornintheyearwhen(=inwhich)WorldWarbrokeoutⅡ.1.when用关系副词where时，先行词指地点，where在定语从句中作地点状语，where可换成“介词+关系代词”。如：Thisisthefarmwhere(=onwhich)weworkedwhenwewereyoung.Theschoolwhere(=inwhich)hismotherteachesisinthewestofthecity.2.where用关系副词why时，先行词指原因，why在定语从句中作原因状语，why可换成“介词+关系代词”。如：Thereareseveralreasonswhy(=forwhich)theboysshouldbepunished.Tomcouldn’tgivetheteacherthereasonwhy(=forwhich)hewaslateforschool.3.why巩固练习：用适当的关系词填空1)October1,1949wastheday______(________)Chinawasfounded.2)Beijingistheplace______(__________)Icame.3)Isthisthereason____(________)hedidn’twanttoseeme?whenonwhichwherefromwhichwhyforwhich4)Isthistheroom______(________)wewerelivinglastwinter?5)Thedaysaregone_____(____________)weused“foreignoil”.6)Yesterday,wehadameeting______(________)wediscussedmanyproblems.whereinwhichwhenduringwhichatwhichwhere对比练习：用适当的关系词填空1.Theroom___________________heoncelivedisstillthere.Theroom___________________Ihavetocleaneverydaybelongstomymother.where/inwhich(that/which)2.Iwillneverforgettheday_______________Imetyou.Iwillneverforgettheday_________...
