Passes on what somebody said and keeps going into your own reaction or question: he says he has to go out right now, what do I do; they said they could take us somewhere else; even dogs don't catch summer colds, and yet here you are. The report is only ever the set-up — the ending exists so you can add the point. It attaches to present-tense action verbs; 다는데 does the same for descriptions and past forms.