It was warm, so I took off my jacket.
What are all these people doing? What’s going on?
The weather was too bad for the plane to take off, so the flight was delayed.
I didn’t want to be disturbed, so I switched off my phone. (*turned off* is also possible but don’t use it)
Rachel got into her car and drove off at high speed. (*went off* is also possible but don’t use it)
Tim has put on weight since I last saw him. He used to be quite thin.
A: What time are you leaving tomorrow? B: I’m not sure yet, but I’d like to set off as early as possible. (*be off* is also possible but don’t use it)
Don’t put off until tomorrow what you can do today.
There was going to be a strike by bus drivers, but now they have been offered more money and the strike has been called off.
Are you cold? Shall I get you a sweater to put on?
When I go away, I prefer to be alone at the station or airport. I don’t like it when people come to see me off. (me)