你快睡觉吧!
Nǐ kuài shuìjiào ba!
Quickly get to bed!
快天黑了,我们走吧!
Kuài tiānhēi le, wǒmen zǒu ba!
It will be dark soon, let's go!
你和丽丽,谁跑得快?
Nǐ hé Lìli, shéi pǎo de kuài?
(Between) you and Lili, who runs faster?