Subject + 燃烧 + (着)
The verb 燃烧 (ránshāo) means 'to burn' or 'to combust,' describing the process of something being on fire or consumed by flames. It can be used both literally for physical fire and figuratively to describe intense passion or energy.
壁炉里的木柴正在燃烧,房间里暖烘烘的。
Bìlú lǐ de mùchái zhèngzài ránshāo, fángjiān lǐ nuǎn hōnghōng de.
The firewood in the fireplace was burning, making the room nice and warm.
森林大火已经燃烧了三天三夜。
Sēnlín dàhuǒ yǐjīng ránshāo le sān tiān sān yè.
The forest fire has been burning for three days and three nights.
他心中燃烧着对音乐的热情。
Tā xīnzhōng ránshāo zhe duì yīnyuè de rèqíng.
A passion for music burned in his heart.