Study the information about phrasal verbs. On and off. Part 2.
1. Verb + on = continue doing something
Drive on/walk on/play on = continue walking/driving/playing
Go on = continue
Keep on doing something
She keeps on criticizing me. I’m fed up with it!
The party went on until 4 o’clock in the morning.
2. Get on = progress
Get on with somebody= have a good relationship
Get on with something= continue doing something you have to do, usually after an interruption.
I must get on with my work. I have a lot to do.
3. Verb + off
Doze off, drop off, nod off = fall asleep
Finish something off = do the last part of something
Go off = explode or ring (an alarm)
Put somebody off doing smth.= cause somebody not to want something or to do something
Rip somebody off = cheat somebody
Show off = demonstrate
Tell somebody off = speak angrily if the person did something wrong
The lecture was not so interesting. In fact I dropped off in the middle of it.
Look at the boy on a new bike. He’s just showing off.
Kate’s mother told her off for wearing dirty shoes in the flat.
Raymond Murphy. English Grammar in Use- Cambridge: CUP, 379p.