on timeat the correct time or the time that was arranged 准时，按时 Jack was worried about whether he’d be able to get there on time. 杰克担心他是否能准时赶到那里。
right/bang/dead on time (=at exactly the right time) 正点 The plane arrived right on time. 飞机准点到达。
n On time means ‘at the correct or agreed time’:
Please arrive on time.
✗Don’t say:
Please arrive in time. In time means ‘early enough for something or to do something’:
He arrived in time for supper.
right/bang/dead on time• Oh no, right on time.• The parade started right on time.• As luck would have it, Piers was dead on time.
→ on time at time1(22)