How did you get in?

Get in the back seat.

How am I to get in?

How did you get in? Do you have a key?

The door was locked and we couldn't get in.

The door was locked, so I couldn't get in.

The boy got in through the window.

He got in with a shotgun in his hands.

I will get in touch

Tom couldn't get in touch with Mary

Do you still get in touch with them?

There is no means to get in touch with him.

In case of an emergency, get in touch with my agent.