all that can be done been done.why is all that?没有that不行吗?

问题描述:

all that can be done been done.
why is all that?没有that不行吗?

all that合起来相当于what(还牢记着高中老师不厌其烦的教诲。。),what can be done has been done.

我也觉得是 that can be done has been done.
这个句子有两个动词 can 和 has been
所以必须有一个连词
all后面应该接that

that 引导一个定语从句,修饰all的
所有能做的,都已经做了

应该是all that can be done has been done.
that can be done 是修饰all的!