烧 + 了 + Duration / 烧 + Object
烧 (shāo) is a verb meaning "to burn" or "to have a fever." When describing illness, it refers to running a high temperature. When describing cooking or fire, it means to burn, cook, or heat. Context determines which meaning applies.
孩子昨天晚上发烧了,烧到三十九度。
Háizi zuótiān wǎnshang fāshāo le, shāo dào sānshíjiǔ dù.
The child had a fever last night, it reached thirty-nine degrees.
小心别把手烧到了,锅很烫。
Xiǎoxīn bié bǎ shǒu shāo dào le, guō hěn tàng.
Be careful not to burn your hand, the pot is very hot.
院子里有人在烧落叶。
Yuànzi lǐ yǒu rén zài shāo luòyè.
Someone is burning fallen leaves in the yard.