French language Q&A Forum

Recently I came across " Qu'est-ce qui ce passe ?" and was informed it was a standard expression in French. I would like to know more about this expression (and any other related ones). A search of Kwiziq failed to come up with it. Merci d'avance,  Andrea

It would seem "Qu'ont fait les hommes" is an accepted sentence. According to the logic of this article, it should be "Que les hommes ont-ils fait." Can anyone explain this difference? Is one of these wrong? Is there some exception for "que?"

I was taught that adjectives that precede the noun are used with a 'de' and not 'des'. Why is there a difference in the usage of 'des bons moments' and 'de bons souvenirs'?

Thanks 

Can somebody please explaine me the difference between 

échauffer

rechauffer

and chauffer

I cannot get it. Thank you