って has many meanings in spoken Japanese. Although I have looked it up in the dictionary, I am still confused about it. Please tell me the following usage.
①いいかげんに早く寝なさいだって(please tell me the combination of だって)
②困ったわねえだってさ(this sentence makes no sense to me)
③ない、ない、ないですって(when someone is denying something)
④そんなこと知ってるって(I think here it is contracted form of と思う