have always been willing如何改写成had always done结构？

have always been willing to do 一直想做某事，改写成had always done结构，要如何写，难道是have always would吗？

have always been willing to do 一直想做某事，

改写成had always done结构，要如何写，

难道是have always would吗？

网友看看，自己提问了些那些问题？

1. 为何要“改”？

2. 目前完成时改成过去完成时，能吗？

3. have always would 语法书上有这种形式吗？这叫什么时态？