看门人

kān mén rén xún shì yī quān zhī hòu bǎ dēng xī miè

看门人巡视一圈之后，把灯熄灭。

The janitor comes round to turn the lights out.

wǒ lí kāi dà lóu de shí hou kān mén rén zhèng zài dǎ sǎo

我离开大楼的时候，看门人正在打扫。

The janitor was just sweeping up as I left the building.