they,a,that,siad,built,year,hospital,before,they,the,last 连词

They said that they built the hosptal a year before last.
再问： a year befoer......last? 好像不对吧。。。？
再答： They said that they built a hosptal the year before last.粗心了，应该这样才对，嘿嘿。 意思是：他们说，前年他们建了一家医院。 又如： She died a natural death the year before last. 她在前年寿终正寝。
再问： 前年是 the year before last year 吧？ 额好吧我再看看