Negation stays unchanged

The negation is not concerned by the inversion. The structure stays at it was described in the french survival guide. The negation construction ne ... pas / plus / jamais clings around the first conjugated verb.

Il n' a rien dit. => N' a-t-il rien dit?
  He did not say anything. => Did he not say anything?  
  Il ne peut pas parler. => Ne peut-il pas parler?
  He cannot speak. => Can't he speak? (Can he not speak.)  
  Il n' a pas pu parler. => N' a-t-il pas pu parler ?
  He was not able to speak. => Was he not able to speak?  

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