关于定语从句中,介词＋关系代词＋不定式的结构

有这种情况She had no time left in which to pack her things他没有时间收拾行李了先行词是time,关系代词是whichwhich代表time,但实际上后面不是定语从句而是不定式to pack her things in the timein which to pack her things全部看成是修饰time的就可以了After the harvest,the peasants selected their best produce with whichto pay their tax to the state。收了庄稼,农民选最好的粮食来交税which代表produce,农作物to pay their tax to the state with produce用农作物来当作税交国家with which to pay their tax to the state。整个就看成是定语来修饰produce虽然是不定式