hadlearned是什么时态

had learned是过去完成时，以过去某个时间为标准，在此以前发生的动作或行为，或在过去某动作之前完成的行为，即“过去的过去”。

例句

A timid child, Isabella had learned obedience at an early age.

伊莎贝拉是一个羞怯的孩子，很小的时候就已经学会了顺从。

Students learned the practical application of the theory they had learned in the classroom.

学生们学会了课堂上学到的理论的实际应用。

Sid had learned his lesson days before.

希德几天前把他要学的段落背熟了。

Dinner time seemed perfect for sharing what we had learned

晚餐时间似乎是一个完美的机会让我们可以分享所学所想。