had never been done信息详情
从未做过
had been done───过去完成时的被动语态
had never been───从来没有……（been是be的过去分词）
had been───已经（过去完成时）
never been───从来没有
never had───从来没有
had been sold───已经被卖掉了
had been on───一直在
he had done───他已经做到了
i had never───我不曾；我从来没有；我以前从未
To my knowledge, a light writing of this size had never been done before.───据我所知，这种规模的轻型书面从未这样做过。
It had never been done before, and it was an obvious thing to do, ” he said.───这种方法在过去从没做过，但这并不难实现，”他说道。
So we created this on-site service program for servicing PCs, which had never been done before.───所以在PC 服务方面，我们开启了现场服务项目，这是史无前例的。
Jordan's demand to have the stripe removed -- which would require restarting production halfway through -- had never been done at Nike.───乔丹的要求把带子去掉——也就是要求重启生产——这在耐克公司前所未有。
Amelia Earhart has inspired generations of women to do things that had never been done by women before.───爱蜜莉亚埃尔哈特启发了世世代代的女性，让她们勇于尝试过去的女人从未做过的事。
It had never been done before because it was physically impossible!───之前从没人这么表演过因为生理上来讲是不可能的！
A good feasibility study would have proved that the policy was totally wrong, but that had never been done.───一个好的可行性调查本来可以证明那个政策是完全错误的，但从来没做过可行性调查。
They rowed across the Atlantic, which had never been done before.───他们划船横渡大西洋，这是史无前例的创举。
"It had never been done before, and it was an obvious thing to do, " he said.───“这种方法在过去从没做过，但这并不难实现，”他说道。
Or just Richie. As far as I knew that had never been done.
This had never been done before with a rocket engine.