Subject + 用 + 牙齿 + 咬 + Object
咬 (yǎo) means "to bite." It refers to the action of using one's teeth to grip or chew something, and can be used for people, animals, or figurative contexts.
小心,那只狗会咬人。
Xiǎoxīn, nà zhī gǒu huì yǎo rén.
Be careful, that dog bites.
我吃苹果的时候不小心咬到了舌头。
Wǒ chī píngguǒ de shíhou bù xiǎoxīn yǎo dào le shétou.
I accidentally bit my tongue while eating an apple.
蚊子把我的手臂咬了好几个包。
Wénzi bǎ wǒ de shǒubì yǎo le hǎo jǐ gè bāo.
Mosquitoes bit my arm and left several bumps.