副词 on time:

1. at the expected time

onprep.在 ... 之上；由 ... 支撑着；在（某一天）；关于；基于adv.穿着；向前（移动)；表示持续性adj.表示已连接、处于工作状态或使用中；发生；值班Ondar翁达尔

1. Sometimes he had to do his work on his own time.
   有时候他要在非工作时间里加班。
2. They should not trespass on her time, they said.
   他们说，他们不该耽误她的工作时间。