we use the subject form when the noun we are replacing is the subject.翻译
问题描述：
we use the subject form when the noun we are replacing is the subject.翻译
答
我们使用主题的时候,我们是名词形式取代为主题
答
当我们取代的名词是主语的时候,就用主格形式 .
主句是we use the subject form ,状语从句是the noun we are replacing is the subject.