has been ：比如說某人去了某地、已經(jīng)回來.
表示去過則用has / have been to
例如:I have been to the Great Wall.(我去過長城)
has+動詞過去分詞：現(xiàn)在完成時.現(xiàn)在完成時表示從過去持續(xù)到現(xiàn)在的動作或狀態(tài).
現(xiàn)在完成時則常與just,already,ever,never等副詞和these days,this week,since...,for...等表示一段時間的狀語連用.