go on duty

• v. 值班；当班

go on duty的用法和样例：

例句

1. I go on duty at 8:00 am.
   我早晨8点钟上班。
2. I arrive at the hospital at eight o'clock, but I don't go on duty until nine.
   我八点钟就到医院了，但是九点钟我才去值班。