who,whom,whose,that,which

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1、定语从句定语从句（AttributiveClauses）在句中做定语，修饰一个名词或代词，有时也可以修饰部分或整个句子。被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。关系代词有：who,whom,whose,that,which，as。关系副词有：when,where,why,how。关系代词和关系副词放在先行词和定语从句之间，起连接作用，同时又可做定语从句的一个成分。当关系代词做宾语时可以省略。定语从句中的谓语动词必须在人称上和数量上和先行词保持一致。定语从句分为限制性定语从句和非限制性定语从句。1、关系代词引导的定语从句1）

2、who,whom,that这些词代替的先行词是人的名词或代词，在从句中所起作用如下：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它们

3、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)关系代词that和which都可以指物，that和Who都可以指人，其用法区别：1）不用that的情况a)在引导非限定性定语从句时(错)Thetree,thatisfourhundredyearso

4、ld,isveryfamoushere.b)介词后不能用Wedependonthelandfromwhichwegetourfood.c)多用who的情况①关系代词在从句中做主语Afriendwhohelpsyouintimeofneedisarealfriend.②先行词为those,people时Thosewhowereeitherfoolsorunfitfortheirofficescouldnotseethecloth.③先行词为all,anyone,ones,one指人时Onewhodoesn’tworkhardwillneversucceedinhiswork.④在Th

5、erebe句型中Thereisastrangerwhowantstoseeyou.⑤在被分隔的定语从句中AnewteacherwillcometomorrowwhowillteachyouGerman.⑥在有两个定语从句的句子中，其一用who,其二用that,但若先行词后接两个以上的并列定语从句时，后一个必须重复前一个关系代词。Thestudentwhowaspraisedatthemeetingisthemonitorthatisverymodestandstudiesveryhard.Thereisateacherwhoisalwaysreadytohelpothersandw

6、hoenjoyswhathedoes.2)只能用that作为定语从句的关系代词的情况a)在不定代词，如：anything,nothing,everything,all,much,few,any,little等作先行词时，只用that，不用which。Allthatisneededisasupplyofoil.Finally,thethiefhandedeverythingthathehadstolentothepolice.b)先行词有theonly,thevery,thejust修饰时，只用that。Heistheverymanthathelpedthegirloutofthew

7、ater.c)先行词为序数词(thelast)、数词、形容词最高级时，只用that。.ThefirstEnglishbookthatIreadwas“ThePrinceandthePauper”byMarkTwin.d)先行词既有人，又有物时。Hetalkedabouttheteachersandschoolsthathevisited.e)当主句是以who或which开始的特殊疑问句时，用that以避免重复。Whoisthepersonthatisstandinga