have/has been done是什么時態(tài)

　　一、have been done的用法：

　　have been done是現(xiàn)在完成時的被動語態(tài)結(jié)構(gòu)。被動語態(tài)完整結(jié)構(gòu)：肯定式為：have/has+been+done。否定式為：have/has+not+been+done。現(xiàn)在完成時是“過去的動作或狀態(tài)持續(xù)到現(xiàn)在并且已經(jīng)完成”。

　　二、have been done的例句：

　　1. A lot of good deeds have been done by him. 他做了很多好事。

　　2.These projects have been finished already. 這些項目已經(jīng)完成。

　　3.The work had not been done very thoroughly.這工作做得不太認(rèn)真。

　　4.They saw the job had been done.他們看到工作已經(jīng)做了。

　　5.She knew it would be difficult to undo the damage that had been done.她知道想要消除已經(jīng)造成的損害是很難的。

　　6.He was angry at finding that nothing had been done. 當(dāng)他知道沒有啥事做出來生起氣來。