has been and gone and

例句：

1. 1. I havebeen to the park before, but Ihaven't gone there since then.
   我以前去过公园，但从那以后就没再去过了。
2. 2.She has been working in the same companyfor ten years.
   她在同一家公司工作了十年。
3. 3. He has been away from home fora week.
   他已经离家一周了。