Has all that can be done been done?为什么用HAS 不用 HAVE PEOPLE也是整体,动词用复数先换成陈述句＝all that can be done has been done主语＝all 定语＝that can be done谓语＝has been done（被动）转换成简单的主句＝all has been doneall 作为一个整体,集合名词所以用单数我的意思是为什么用HAS 不用 HAVE PEOPLE也是整体，动词用复数 that为主语的话，无论that指的是单数还是复数，谓语动词都要用单数？
问题描述：
Has all that can be done been done?
为什么用HAS 不用 HAVE
PEOPLE也是整体,动词用复数
先换成陈述句＝all that can be done has been done
主语＝all
定语＝that can be done
谓语＝has been done（被动）
转换成简单的主句＝all has been done
all 作为一个整体,集合名词所以用单数
我的意思是为什么用HAS 不用 HAVE
PEOPLE也是整体，动词用复数
that为主语的话，无论that指的是单数还是复数，谓语动词都要用单数？
答
这个。。是在问问题还是啥。。？
答
all修饰that.
that为主语.所以用HAS.
that本来就是一个代表单数的代词.如果要用复数的代词的话那只能是those
that的复数就是those了.
明白么?