has been后面加形容詞是什么時(shí)態(tài)

　　例句：

　　1、The present regime has been in power for two years.

　　現(xiàn)政權(quán)已經(jīng)執(zhí)政兩年了。

　　2、There has been a lot of resistance to this new law.

　　這項(xiàng)新的法規(guī)已經(jīng)遇到很多的抵制。

　　3、She has been to China.

　　她去過(guò)中國(guó)。

　　4、Only time will tell if the treatment has been successful.

　　只有時(shí)間才能證明這種療法是否成功。

　　5、The software we use has been modified for us.

　　我們使用的軟件已按我們的需要作過(guò)修改。