Charles did what he could the scrvant ,although he himself was in danger
问题描述：
Charles did what he could the scrvant ,although he himself was in danger
A resue B resued C to rescue Drescuing
答
C
what he could 是一个名词词组,意思是他所能做的
所以句子可以看成Charles did sth.to rescue the servant
查尔斯竭尽所能去营救仆人he could the scrvant 是宾语从句 选C是非谓语形式吧？那么Could是情态动词可以单独做谓语吗？ 那么从句中谓语是什么he could the scrvant 不是什么宾语从句，根本不是组合在一起的是what he could没有非谓语形式没有从句to rescue难道不是非谓语吗？帮我解释一下这个句子的结构？结构和We do it to help you.一样Charles 就是上面的wedid 就是上面的dowhat he could 就是上面的itto rescue the servant 就是上面的to help you还有，could可以单独做谓语