2 sentences for 门卫 (mén​wèi)

1. 他今天在军营大门口值门卫。

   tā jīn​tiān zài jūn​yíng dà​mén​kǒu zhí mén​wèi.

   He is on guard duty at the main gate of the barracks today.

   Source: Dong Chinese Dictionary

2. 门口的门卫要求访客出示身份证并登记。

   mén​kǒu de mén​wèi yāo​qiú fǎng​kè chū​shì shēn​fèn​zhèng bìng dēng​jì.

   The guard at the gate asked visitors to show their IDs and register.

   Source: Dong Chinese Dictionary