你该走了。
nǐ gāi zǒu le.
You should go.
该你了。
gāi nǐ le.
It's your turn.
该公司已经关闭。
gāi gōngsī yǐjīng guānbì.
The aforementioned company has closed.
请联系该部门。
qǐng liánxì gāi bùmén.
Please contact that department.
