Turning adjectives into adverbs in Chinese is a piece of cake!

Structure

You can easily convert Chinese adjectives into adverbs with 地 (de). This character is very similar to the English suffix -ly.
Subject + Adjective + 地 + Verb

Examples

Nǐ yào hěn rènzhēn dì xuéxí.
你 要 很 认真 地 学习。
You are going to study very seriously.

Yéye mànmàn dì zǒulù.
爷爷 慢慢 地 走路。

Grandpa walks slowly.

Wǒmen shūfu dì tǎnɡ zài nàlǐ.
我们 舒服 地 躺 在 那里。
We comfortably laid down here.