定语：修饰名词或代词的词、短语或从句称为定语。定语可由以下等成分表示：Guilinisabeautifulcity.（形容词）Chinaisadevelopingcountry;Americaisadevelopedcountry.（分词）Therearethirtywomenteachersisourschool.（名词）HisrapidprogressinEnglishmadeussurprised.（代词）Ourmonitorisalwaysthefirsttoentertheclassroom.（不定式短语）Theteachingplanfornexttermhasbeenworkedout.（动名词）HeisreadinganarticleabouthowtolearnEnglish.（介词短语）【定语从句】一.概念在复合句中,修饰某一名词或代词的从句,称为定语从句,也叫形容词性从句二.相关知识点精讲1.关系代词引导的定语从句关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。1）who,whom,that这些词代替的先行词是人的名词或代词，在从句中作主语和宾语。例如：Ishethemanwho/thatwantstoseeyou?（who/that在从句中作主语）Heisthemanwhom/thatIsawyesterday.（whom/that在从句中作宾语）2）whose用来指人或物，（只用作定语,若指物，它还可以同ofwhich互换）。例如：Theyrushedovertohelpthemanwhosecarhadbrokendown.Pleasepassmethebookwhose（ofwhich）coverisgreen.3）which,that所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等。例如：Aprosperitywhich/thathadneverbeenseenbeforeappearsinthecountryside.（which/that在句中作宾语）Thepackage（which/that）youarecarryingisabouttocomeunwrapped.（which/that在句中作宾语）2.关系副词引导的定语从句关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。1）关系副词when,where,why的含义相当于"介词+which"结构，因此常常和"介词+which"结构交替使用。例如：Thereareoccasionswhen（onwhich）onemustyield.Beijingistheplacewhere（inwhich）Iwasborn.Isthisthereasonwhy（forwhich）herefusedouroffer?介词﹢关系代词引导的定语从句,关键是判断介词的选择,方法一是看从句谓语部分缺少什么介词(习惯搭配),再则可以通过整个句子整体含义来判断,结合生活实际来判断.【练习】1.Doyouknowwholivesinthebuilding______thereisawell?A.infrontofitB.infrontofwhoseC.infrontofwhichD.infrontwhich2.I’llneverforgettheday____IjoinedtheLeague.A.onwhichB.inwhichC.whichD.atwhich3.Thewoman_____mybrotherspokejustnowismyteacher.A.whoB.towhomC.towhoDwhom4.Jeannewasheroldfriend,____sheborrowedanecklace.A.fromwhoB.fromwhomC.tothatD.towhom5.Hisglasses,_____hewaslikeablindman,felltothegroundandbrokeitsleg.A.whichB.withwhichC.withoutwhichD.that6.sheisateacherofmuchknowledge,_____muchcanbelearned.A.whoB.thatC.fromwhichD.fromwho7.Hebuiltatelescope_____hecouldstudytheskies.A.inwhichB.withthatC.throughwhichD.byit8.Doyouknowth