•ThetimewhenIfirstmetNelsonMandelawasaverydifficultperiodofmylife.when指代time;when在从句中作状语=atthetimeatthetimeIfirstmetNelsonMandela.IfirstmetNelsonMandelaatthetime.•Itwasin1952andMandelawastheblacklawyertowhomIwentforadvice.tothelawyerIwentforadviceIwenttothelawyerforadvice.whom指代lawyer;whom在从句中作宾语towhom=tothelawyer•Hewasgenerouswithhistime,forwhichIwasgrateful.forthetimeIwasgratefulIwasgratefulforthetime.which指代time;which在从句中作宾语forwhich=forthetime•TheschoolwhereIstudiedforonlytwoyearswasthreekilometresaway.intheschoolIstudiedforonlytwoyearsIstudiedintheschoolforonlytwoyears.where指代school;where在从句中作地点状语where=intheschool•However,thiswasatimewhenonehadgottohaveapassbooktoliveinJohannesburg.DuringthetimeonehadgottohaveapassbooktoliveinJohannesburg.when指代time;when在从句中作时间状语when=inthetime/duringthetime•ThedaywhenNelsonMandelahelpedmewasoneofmyhappiest.OnthedayNelsonMandelahelpedme.when指代day;when在从句中作时间状语when=ontheday•Thelastthirtyyearshaveseenthegreatestnumberoflawsstoppingourrightsandprogress,untiltodaywehavereachedastagewherewehavealmostnorightsatall.Atthestagewehavealmostnorightatall.where指代stage;where在从句中作地点状语where=atthestage•Thepartsoftowninwhichtheyhadtoliveweredecidedbywhitepeople.Inthepartstheyhadtolive.which指代parts;which在从句中作宾语Inwhich=intheparts•TheplacesoutsidethetownswheretheyweresenttolivewerethepoorestpartsofSouthAfrica.Intheplacestheyweresenttolive.Theyweresenttoliveintheplaces.where指代places;where在从句中作地点状语Where=intheplaces•Wewereputintoapositioninwhichwehadeithertoacceptwewerelessimportant,orfightthegovernment.Inthepositionwehadeithertoacceptwewerelessimportant,orfightthegovernment.which指代position;Which在从句中作宾语Inwhich=intheposition•Wefirstbrokethelawinawaywhichispeaceful.Thewayispeaceful.which指代way;Which在从句中做主语