The room changed around me, turning into the reception area upstairs.

As he stood and looked at it, the room changed.

You know this room hasn't changed much at all since I was first here?

The room hasn't changed much; the door was closed, so there's little dust.

The room had changed, become a reverse image of itself.

The room had not changed, and perhaps the invisible audience was the same.

If the room hadn't changed, however, the men in it had.

They're in love and that's why the room has changed.

The room had changed very little in a score of years.

The moment the last word left her lips, the room changed.