这三个单词过去分词都是been，am、is的过去式是was，are的过去式是were。

例句：

1、These files have been zipped up to take up less disk space.  

这些文档已经进行了压缩，以节省磁盘空间。

2、Things might have been different if I'd talked a bit more.  

如果当时我再多说一点的简档瞎话，结果或许会不一样。

3、He was hand-picked for this job by the Admiral. 

他是由海军上将精心挑选出来担任这项工作的。

4、I was on my own and these fellows came along towards me.  

我正一个人走着，一些家伙朝我走过来。

5、My cuticles were split and ragged, and my nails unevenly bitten.  

我指甲根部的表皮龟裂粗糙，指甲被咬得参差不齐。

相关句子：

1、Early American weathervanes were most often cut from flat wooden boards.  

美国早期的风向拦空标大多截自平直的木板。

2、They were knocking around together for about a year.  

他们交往大概有一年了。

3、He was fired from his job after roughing up a colleague.  

他因为对一位同事蠢亏动粗而被开除了。