满意答案心吾悟6级2011-02-11which可以引导定语从句,宾语从句,主语从句Iboughtaroomyesterday,whichusedtobelongtoTom.(定语从句)Idon'tknowwhichoneIshouldbuy.(宾语从句)Whichbusweshouldtakeisstillaquestion.(主语从句)定语从句中是做关系代词宾语和主语从句中是做疑问代词追问:在从句中which做的成分能详细点吗回答:which在定语从句中可以做主语和宾语.做表语只能用that.如:Ifoundthebookwhichhesentmetwoyearsago.which做sendsbsth中的宾语成分IfoundthebookwhichbelongstoMary.which替代book做从句的主语which在宾语从句和主语从句中和后面的名词一起构成句子中的成分.which翻译成哪一个.Whichbusweshouldtakeisstillaquestion.中和bus一起做take的宾语.