请问what can be done的语法结构刚刚听新闻,主播说到 What can be doen to stop them?请问what can be done是什么结构啊?是疑问词作主语吗?

请问what can be done的语法结构刚刚听新闻,主播说到 What can be doen to stop them?请问what can be done是什么结构啊?是疑问词作主语吗? What's done can not be undone. Everything can be done has been done.请问这里can be done 用的是什么时态?是被动句吗?请求分析这句句子：Everything can be done has been done.请问这里can be done 用的是什么时态?是被动句吗?这里has been done用的 有一首英文歌女生唱的,歌曲刚开始是“done done to be do,tell what can i do”,求歌名 What's done can not be undone 的中文.普通意思, 精解释一个句子what‘s done can't be undone.的意思 what has been done can not be undone What can be done to help the endangered wild animals? what is done can’t be undone!翻译 What's done can't be undone 翻译下 成语. America has never been about what can be done for 用what或者who合并句子all can be done.all must be done it can be done Don’t put off until tomorrow what can be done today.为什么这里要用done? What is done can’t be ____.A) done B) undone C) undo D) undid what to do 与what to be done的区别 All that can be done __been done.请问该用has还是 have? 帮忙解释这个英语句子的结构,感觉有错误What can be done endorsement of the transfer?