has been done是什么时态怎么翻译

　　find it ludicrous that nothing has been done to protect passengers from fire

　　乘客没有受到任何防火保护，这让我觉得十分荒唐。

　　This has been done by plundering  4 billion from the Government reserves.

　　这是通过侵占40亿英镑的政府储备金完成的。

　　She was born with a silver spoon in her mouth and everything has been done for her.

　　她出生于富贵人家，什么事都已为她安排得好好的。

　　This job has been done well.

　　这活干得挺像样子。

　　The work has been done as per instructions.

　　工作已按指示完成。