On and off for lights, machines etc.
We say:
the light
is on / put the light
on / leave the light
on etc.
turn the light
on/off or switch the light
on/off- Shall I leave the lights on or turn them off?
- 'Is the heating on?' 'No, I switched it off.'
- We need some boiling water, so I'll put the kettle on.
Also put on some music / a CD etc.
- I haven't listened to this CD yet. Shall I put it on? (= shall I play it)
On and off for events etc.
go on =
happen- What's all that noise? What's going on? (= what's happening)
call something
off =
cancel it- The open air concert had to be called off because of the weather.
put something
off,
put off doing something =
delay it- The wedding has been put off until January.
- We can't put off making a decision. We have to decide now.
On and off for clothes etc.
put on clothes, glasses, make-up, a seat belt etc.
- My hands were cold, so I put my gloves on.
Also put on weight =
get heavier- I've put on two kilograms in the last month.
try on clothes (to see if they fit)
- I tried on a jacket in the shop, but it didn't fit me very well.
take off clothes, glasses etc.
- It was warm, so I took off my jacket.
Off = away from a person or place
be off (to a place)
- Tomorrow I'm off to Paris / I'm off on holiday.
(= I'm going to Paris / I'm going on holiday)
walk off / run off / drive off / ride off / go off (similar to
walk away / run away etc.)
- Diane got on her bike and rode off.
- Mark left home at the age of 18 and went off to Canada.
set off =
start a journey- We set off very early to avoid the traffic. (= We left early)
take off =
leave the ground (for planes)- After a long delay the plane finally took off.
see somebody
off =
go with them to the airport/station to say goodbye- Helen was going away. We went to the station with her to see her off.