を学んで

learn …

→ を
phrase Rare #29,663
learn … The particle を marks what is being learned. 学んで is the connective form of 学ぶ and can link to another phrase or combine with forms such as いる to describe ongoing learning.
JA: 大学で日本史を学んでいます。
EN: I’m studying Japanese history at university.

学生時代に中国語を学んでおいたのは好都合だった。

It was fortunate that I had studied Chinese when I was a student.

その大学生は工学を学んでいます。

That university student is studying engineering.

何の言語を学んでいるの?

What language are you learning?

失敗から何かを学んでくれるといいけど。

I hope you learn something from your mistakes.

私たちは英語を学んでいた。

We were learning English.