客人来了。
Kèrén lái le.
The guest has arrived.
他是我的客人。
Tā shì wǒ de kèrén.
He is my guest.
客人要买这个。
Kèrén yào mǎi zhège.
The customer wants to buy this.
请给客人结账。
Qǐng gěi kèrén jiézhàng.
Please bill the customer.