it s been是什么時(shí)態(tài)

it s been是現(xiàn)在完成時(shí)。
been
v. 是，有（be的過(guò)去分詞）
例句：
You could have been killed!
你本可能被殺了。
These figures have been disputed.
有人對(duì)這些數(shù)字提出了質(zhì)疑。