lungs help us breath.

首字母大写
breath: n
breathe: v

Lungs help us breathe.

lungs can outo-breath

首字母大写
breath: n
breathe: v
自动的前缀是：auto 而肺部自主呼吸自动呼吸有常用组合：spontaneously breathe

Lungs can auto-breathe/spontaneously breathe.

People must has lungs

good

I use sack to clean the table.

good

I bye a sack today.

buy

He lost his sack.

good