I lived here for three years和I have lived here for three yea

I lived here for three years.我曾在这住了三年.
I have lived here for three years.我已经在这住了三年了.
再问： 所以前者的for加时间段就不是现完的标志？
再答： 一般而言，for加时间段是现在完成的标志，但是具体问题要具体分析，
前者的句子是一般过去式。