all the efferts that someone has done is ----- has done 之后能直接加动词is么?

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all the efferts that someone has done is ----- has done 之后能直接加动词is么?

all the efferts that someone has done is ----- has done 之后能直接加动词is么?
all the efferts that someone has done is ----- has done 之后能直接加动词is么?

all the efferts that someone has done is ----- has done 之后能直接加动词is么?
这里是 efforts吧.
分析这个半句,that 引导的从句充当efforts的定语,理解时可以这样看:all the efforts( that someone has done)-----------
这样的话,就很清楚了,主语是efforts,谓语应该跟efforts 保持一致,所以如果是be动词的话,也应该是are.
希望我的回答对你有所帮助!

are
1.All my efforts were vain.
我的一切努力都白费了。
2.All her efforts were doomed to failure.
她付出的所有努力注定失败。
3.All his efforts are written in water.
他的一切努力却已成为泡影。

all the efforts that someone has done这相当于一个长名词(定语从句)后面可以用is
我不确定,是用are?一个句子不是可以用is修饰?