定语从句用that不用who

必须用that 1。当everything,anything,nothing,all,none充当先行词时。2。当先行词由every,any,all,some,no,little,few,much等修饰时,that常被省略3。当先行词前有序数词或最高级修饰时4。当先行词前有the very,the only,the just修饰时5。当先行词本身是who,which时6。当先行词是人物混有时7。当先行词前有the same修饰,两物为同一物时8。当先行词在从句中代替人做主补时