Once ____(speak)out ,it can't be taken back.

问题描述:

Once ____(speak)out ,it can't be taken back.

spoken
被动语态
一旦被说出来,就很难收回。

speaken
省略了(it is)
Once it is speaken out

Once __spoken__(speak)out ,it can't be taken back.意思是说出去的话~泼出去的水
话是被说~所以用过去分词…也可以理解为省略…
希望帮到您