As he turned the knob, the door opened before him.

I asked, and turned the knob of the door at the end.

I turned the knob and opened the door to let myself in.

Then, giving up, I turned the knob and started to open the door.

If her heart had continued to race, she might not have turned the knob.

She followed his hand as he began to turn the black knob.

After a moment he turned the knob and looked in the room.

At last he turned the little knob again, and nothing happened.

His hand turned the knob of the door at the end.

Making up her mind, she turned the knob and opened the door.