他学过功夫。

Tā xuéguò gōngfu.

He learned Kung Fu.

他的功夫很厉害。

Tā de gōngfu hěn lìhai.

His Kung Fu is impressive.

只要你肯下功夫，就一定会进步。

Zhǐyào nǐ kěn xià gōngfu, jiù yídìng huì jìnbù.

As long as you are willing to put in the effort, you will definitely improve.