Use of "n'est-ce pas"

Question

In answer to this question..."Marie vient demain" Now turn this sentence into a question, using "n'est-ce pas"... I answered "N'est-ce pas que Marie vient demain?Why is this wrong? I admit it seems clunky (overly formal?).

Maarten Kamp · Accepted Answer

Shelley is correct -  “ n’est-ce pas “ can only be used at the end of the phrase. The ‘ question ‘ has to be stated as an affirmative statement, with ‘ n’est-ce pas ‘ following. It is used when stating something you already believe to be true, and are really just expecting confirmation. 
From the lesson
 
 
   
3. Append ...n'est-ce pas?
Pronounced "ness pah", this is like adding is it not?  to the end.  
Tu es Jane, n'est-ce pas ?You are Jane, aren't you?
 
Tu parles anglais, n'est-ce pas ?You speak English, don't you?

Shelley Hoose · Answer

I think it should be at the end of the sentence, i.e., "Marie va venir demain, n'est-ce-pas?"

Harry Audus · Answer

Maybe it could be "N'est-il pas que Marie vient demain?"