你要多练习才会进步。

Nǐ yào duō liànxí cái huì jìnbù.

You need more practice to improve.

我在练习说中文。

Wǒ zài liànxí shuō Zhōngwén.

I'm practicing speaking Chinese.

我每天都练习弹钢琴。

Wǒ měitiān dōu liànxí tán gāngqín.

I practice playing the piano every day.