我要走了。
Wǒ yào zǒu le.
I have to go.
你吃饱了就出去走走吧!
Nǐ chī bǎo le jiù chūqù zǒuzou ba!
Go out for a walk when you're full.
他走得很快。
Tā zǒude hěn kuài.
He walks very fast.