烧掉 + Object
烧掉 (shāodiào) means "to burn up" or "to burn away," indicating the complete destruction of something by fire. The complement 掉 emphasizes that the object is gone after burning. For example, 最好烧掉它 means "it's best to burn it."
她把那些旧信全都烧掉了。
tā bǎ nàxiē jiù xìn quán dōu shāo diào le.
She burned all those old letters.
做饭的时候不小心把菜烧掉了。
zuòfàn de shíhou bù xiǎoxīn bǎ cài shāo diào le.
While cooking, I accidentally burned the food.
他决定把日记烧掉,不想让任何人看到。
tā juédìng bǎ rìjì shāo diào, bù xiǎng ràng rènhé rén kàn dào.
He decided to burn his diary, not wanting anyone to see it.