UC知道倒装高手请进Only when he had done it___that he had made a mistake.
来源：百度知道 编辑：UC知道 时间：2024/05/28 02:42:07
a.he had realized
b.had he realized
c.did he realize
d.he did realize
选择哪个?为什么?我水平太差请说详细一下,谢谢!
b.had he realized
c.did he realize
d.he did realize
选择哪个?为什么?我水平太差请说详细一下,谢谢!
选C，only修饰副词，介词短语，状语从句置于句首，句子要部分倒装，尤其是在修饰状语从句时，状语从句不倒装，主句部分倒装，将助动词置于主语之前。因为he had done 在realize 动作之前发生，所以realize用过去是就行了
C...倒装．．．都说题目是倒装了．．．．当然助动词要提前
C...