early 15c., "showing the person or thing spoken to," from Middle French vocatif, from Latin vocativus (casus) "(case of) calling," from vocatus, past participle of vocare "to call" (see voice (n.)). The Latin is a translation of Greek kletike ptosis, from kletikos "related to calling," from kletos "called." As a noun from 1520s.
实用例句
1. The vocative case is used to address someone by name.
呼格用于称呼别人的名字.
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2. In Polish, the vocative is almost always different from the nominative case.