There was no way he could open them without the key.

He opened the case without an order to do so.

They had opened the season without a true center and got off to a 4-14 start.

The door had never been opened without the light coming on.

One did not open the door on a winter night without some light by which to see who came.

Her mouth opened and closed without any sound coming out.

"Do you remember how the front door opened without anyone there to open it, when we came today?"

For years we have had problems with the ancient front door to our building, which is easy to open without a key.

He led the two men to a small door; it opened without a key.

"We should never have opened the season without an agreement."