been加過去分詞是什麼時態

It's been quite a day, one way and another.

從幾方面看，這是不尋常的一天。

Their family has always been well thought of around here.

他們家在這一帶一直頗受敬重。

There have been many changes in recent years.

近幾年發生了許多變化。

A new system has been devised to control traffic in the city.

控制城市交通的新系統已經設計出來。

We had to work within the parameters that had already been established.

我們必須在已設定的範圍內工作。