which,that区别如下.asIhadexpected是作状语 　　它们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,thatisfourhundredyearsold,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Therebe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. 　　Thereisateacherwhoisalwaysreadytohelpothersandwhoenjoyswhathedoes. 　　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. 　　Heistheverymanthathelpedthegirloutofthewater. 　　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. 　　Whoisthepersonthatisstandingatthegate. 　　f)关系代词在从句中做表语 　　Heisnotthemanthatheusedtobe.