learn的过去式和过去分词

It was a prayer she had learnt as a child.

这是她儿时就学会了的.祈祷文。

She learnt to sign to help her deaf child.

为帮助她耳聋的孩子，她学会了手语。

Today we learnt how to use the new software.

今天我们学习了怎样使用这个新软件。