on time

in time, on time

这两个词组都可表示“按时”。
in time: 表示及时。指没有迟到，时间还充裕。
on time: 表示准时，按时。指按规定的时刻，不早不晚。

形容词 on time:

1. according to schedule or without delay
   同义词：prompt

副词 on time:

1. at the expected time
   同义词：not late, not delayed

1. I couldn't have got to the meeting on time -- unless I had caught an earlier train.
   我不可能及时赶到会场，除非我赶上了较找的一班火车。
2. We can depend on his arriving here on time.
   我们可以相信他会准时到来。
3. The child's parents were frantic when she did not return home on time.
   那孩子没有按时回家，她父母都要急疯了。
4. The rain kept us from getting there on time.
   那场雨使我们不能准时到达那里。
5. The boss ordered that the work should be done on time.
   老板吩咐工作必须按时完成。
6. You must get to the station on time.
   你必须准时赶到车站。
7. He will come on time even though it rains.
   即使下雨，他还是会准时来的。
8. To our astonishment, they arrived on time.
   使我们惊讶的是，他们准时到了。