has been at

• conj. 到过(去过)

has been at的用法和样例：

例句

1. My father has been at rest since I was a girl.
   在我还是小女孩时，我父亲就已去世了。
2. The country has been at war with its neighbour for two years.
   这个国家与邻国已打了两年仗了。