Mark all of the prepositional phrases, and tell how these phrases help to clarify the action.

"We didn’t wait to look at one another. I took Irene’s arm and forced her to run with me to the wrought-iron door, not waiting to look back. You could hear the noises, still muffled but louder, just behind us. I slammed the grating and we stopped in the vestibule. Now there was nothing to be heard."