Thevocative case is used to address someone by name.
呼格用于称呼别人的名字。
2
The informative function is the premise, while thevocative function serves as the ultimate goal.
信息功能是前提，祈使功能是最终要达到的目的。
3
The ultimate end of advertisement is to realize thevocative function, which depends on the combined realization of informative and expressive functions.