（原创文章，转载请注明来源“秀哈英语”） 表示在过去的某个时间或动作以前已经发生的动作或已经存在的状态。就是我们常说的"过去的过去"。
句式举例had done
1、主语第一人称
（单数）
I had done....
（复数）
We had done....
2、主语第二人称
（单、复数）
You had done....
3、主语第三人称
（单数）
She had done....
He had done....
It had done....
Lily had done....
Tom had done....
My mom had done....
Your uncle had done....
The dog had done....
（复数）
They had done....
