完成时和过去式的判断Nana served as a photographer for five years in the club,and now she is the CEO.为什么不是has served

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完成时和过去式的判断Nana served as a photographer for five years in the club,and now she is the CEO.为什么不是has served

完成时和过去式的判断Nana served as a photographer for five years in the club,and now she is the CEO.为什么不是has served
完成时和过去式的判断
Nana served as a photographer for five years in the club,and now she is the CEO.为什么不是has served

完成时和过去式的判断Nana served as a photographer for five years in the club,and now she is the CEO.为什么不是has served
完成时和过去式虽然都表示这件事已经干过了!但是完成时强调干过的这件事对现在,过去,将来的影响!而过去式只表示这件事已经干过了!句中Nana只是说她以前是干什么的,对现在的职位没有影响~所以~

书面语应该是用完成时,
美国人喜欢用过去式代替完成时

是过去一段时间的状态,和现在无关。