（原创文章，转载请注明来源“秀哈英语”） 时态含义
表示某一动作一直延续到过去某一时间，是否继续下去，应视上下文而定。
例句
The old clock had been being taken apart of and fixed up again for several times by my 10-year old son before I came back home.
我回到家之前，我10岁大的儿子已经把这个旧钟表拆卸并重新组装了好几回了。
肯定句式had been doing
1、主语第一人称
（单数）
I had been doing....
（复数）
We had been doing....
2、主语第二人称
（单、复数）
You had been doing....
3、主语第三人称
（单数）
She had been doing....
He had been doing....
Lily had been doing....
Tom had been doing....
My mom had been doing....
Your uncle had been doing....
It had been doing....
The dog had been doing....
（复数）
They had been doing....
