---when(adv)---(1)whendoyoucomeback?=atwhattime(adv)(2)whenwouldyoubeback?(shouldbebetter;itmeansinwhatcircumstancestobepossiblebeback.)(1)whendoyoufinishschool?=atwhattime.(2)whenyou'vefinishedschool?(=meansatthattimethatyoujustfinishedschool;astatementafterall)。
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