hasbeen done是什么时态

　　Extensive research has been done into this disease.

　　对这种疾病已进行了广泛研究。

　　A great deal has been done internally to remedy the situation.

　　已经做了很多内部工作对这种情形进行补救。

　　I 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。