to had been done是什么時態

　　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.

　　這些項目已經完成。

　　3、The work had not been done very thoroughly.

　　這工作做得不太認真。

　　4、They saw the job had been done.

　　他們看到工作已經做了。

　　5、She knew it would be difficult to undo the damage that had been done.

　　她知道想要消除已經造成的損害是很難的。

　　6、He was angry at finding that nothing had been done.

　　當他知道沒有啥事做出來生起氣來。