gōng zuò
work
job
na3r?
where?
tóng xué
fellow student
schoolmate
classmate
xuésheng
student
yī shēng
doctor
yī yuàn
hospital
ni3 zài na3r gōngzuò?
where do you work?
wo3 zài xuéxiào gōngzuò
I am working in a school
wo3 shì la3oshī
I am a teacher
tā bù shì yī shēng
(s)he is not a doctor