help sb.do sth 的固定用法中,help后面用动词原形.
而你的这句话：
主语 they
谓语动词：have done现在完成时态
宾语（从句）all they could
to help him在这里应该是目的状语从句
翻译：他们已经做了他们所能做的一切去帮助他.
They have done all they could "to help" him.为什么是"to help"?
They have done all they could "to help" him.为什么是"to help"?
英语人气：527 ℃时间：2019-08-20 20:56:07
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