Something ought to have been done before now.

先前就该采取措施了。

How could it have been done?

这怎么可能做得到呢？

Trivial formalities have been done away with.

繁琐礼节都取消了。

What could have been done better?

有哪些本可以做的更好？

It could have been done carefully.

它可能被小心地搜寻过。