Idiomatic Expressions for Beginners Set#1

to enter or to board a vehicle
to get in is used for cars, to get on is used for all other forms of transportation.
It's easiest to get in the car from the driver's side. 
I always get on the bus to work at 34th Street.

to leave or to descend from a vehicle
to get out of is used for cars, to get off is used for all other forms of transportation.
Why don't we stop and get out of the car for a while?
Helen got off the train in Berlin.

to place on oneself (usually said of clothes)
- Mary put on her coat and left the room.
- Put your hat on before you leave the house.

to remove (usually said of clothes)
- John took off his jacket as he entered the office.
- Take your sweater off. The room is very warm.

to telephone (also: to give someone a call)
to call can be used instead of to call up, as in the example:
I forgot to call up Mr. Jones yesterday I'd better call him now.

to start or cause to function (also: to switch on)
- Please turn on the light; it's too dark in here.
- Do you know who turned the air conditioning on?

to cause to stop functioning; also: to switch off, to shut off
Turn on and turn off, as well as their related forms, are used for things that flow, such as electricity, water, gas, etc.
- Please turn off the light.

very soon; immediately (also: at once)
Dad says that dinner will be ready right away, so we'd better wash our hands and set the table.
Tell Will to come to my office right away. I must see him immediately.

to lift from the floor, table, etc., with one's fingers
Harry picked up the newspaper that was on the front doorstep.
Could you pick your toy up before someone falls over it?

to pick up
- Could you pick your toy up before someone

eventually, after a period of time
If you study English seriously, sooner or later you'll become fluent.
I'm too tired to do my homework now; I'm sure I'll do it sooner or later.

to arise, to rise from a bed
- Carlo gets up at seven o'clock every morning.

in the beginning, originally
- At first, English was difficult for him, but later he made great progress.