has been后面加什么词性
have been可以接现在完成时，还可以接正在进行时，或者接现在完成时的被动语态。
例句
The original manuscript has been lost.
原稿已经遗失。
He has been late on numerous occasions.
他已经迟到过无数次了。
A peaceable settlement has been reached.
已经实现和解。
The gene for asthma has been identified.
哮喘病的基因已被识别。
Since 1977 otter hunting has been illegal.
捕猎水獭1977年以后就被列为非法了。