Adjective + 地 + Verb
地 (de) is a structural particle placed after an adjective or descriptive phrase to form an adverb that modifies a verb. It functions like the English "-ly" suffix, turning descriptive words into manner adverbs. When 地 is used, the descriptive word before it describes how the action is performed.
她高兴地跳了起来。
Tā gāoxìng de tiào le qǐlái.
She jumped up happily.
孩子们开心地在公园里跑来跑去。
Háizimen kāixīn de zài gōngyuán lǐ pǎo lái pǎo qù.
The children ran around happily in the park.
他认真地完成了每一项任务。
Tā rènzhēn de wánchéng le měi yī xiàng rènwù.
He carefully completed every task.