修饰物体时关系代词that和which的区分使用that的情况：1.当先行词是nothing,something,anything,all,each等不定代词时。e.g.Doyouhaveanythingthatisimportanttotellme?2.当先行词被all,any,some,no,not,every,each等修饰时。e.g.Ihavesomebooksthatareverygood.3.当先行词被形容词最高级、序数词所修饰时。e.g.ThisisthefirstbookthatIboughtmyself.ThebiggestbirdthatIcaughtisthisbird.4.主句是以which或who开头的特殊疑问句时e.g.Whichisthebikethatyoulost?Whoisthewomanthatwaspraisedatthemeeting.5.当先行词在从句和主句中都作表语时,无论先行词是人还是物.Chinaisnolongerthecountrythatshewas.6.如有两个定语从句,其中一个已用which引导,另一个宜用that.Edisonbuiltupafactorywhichproducedthingsthathadneverbeenseenbefore.7.在therebe句型中,只用that.Heaskedforthelatestbook(that)thereisonthesubject.8.当先行词被thevery,thelast,thenext,theonly等词修饰时。e.g.ThisistheverybookthatIlostyesterday.9.当先行词又有人又有物时。e.g.Iwon’tforgetthethingsandthepersonsthatIsaw.只能使用which的情况。1、非限制性定语从句中。e.g.Maryhasabook,whichisveryprecious.2、在介词之后。e.g.Thisisahouseinwhichlivesanoldman.3、当主句中的主语被that修饰时。e.g.ThatdogwhichIfoundinthestreetbelongstoMary.
