how does this grammar function? ~다면서요?
Here's an example: 환자가 응급실에서 죽었다면서요?

I heard that the patient passed away at the emergency room?

Question

how does this grammar function? ~다면서요?
Here's an example: 환자가 응급실에서 죽었다면서요?

I heard that the patient passed away at the emergency room?

Answer

It's equivalent to "I heard that...." and you're asking if it is true/correct.

Adj / (Verb + ㄴ/는) + 다면서요

e.g.
아팠다면서요? = I heard you were hurt (is it true?)
전화 한다면서요? = I thought you said you will call (is it true?)
하교에 갔었다면서요? = I heard you went to school (is it true?)

You can drop the 요 for informal speech.

Answer

I've heard that~~ 
people says that ~~

it's utilised when we borrow other's words.

Answer

If you say ~다면서요?, you mean you ask someone again something you have heard.

Ne manquez pas cette occasion d'apprendre une langue depuis chez vous. Découvrez notre sélection de professeurs de langues expérimentés et inscrivez-vous dès maintenant à votre premier cours !