This is not usually done (especially not with young boys), but is nonetheless correct if you want to. Overformal in my opinion.
"Monsieur" is the equivalent of "Mr." in French. It is used to address or refer to a man in a formal or polite manner.
'monsieur', pl. : 'messieurs'
Monsieur, Je vous écris.......
You call him Monsieur, pronounced something like M'syuh.
You call him Monsieur, pronounced something like M'syuh.
Men are 'les hommes' in French. address them as 'monsieur'.
All that I know is that do not address the waiter as "un garcon" meaning boy which was previously commonly used, now it is considered rude and you should instead address them "monsieur" or mr./sir in English
The French term for 'Mister' is 'Monsieur.'
In French, the equivalent of Mr. is "Monsieur".
Monsieur et Madame Smith, and try not to pronounce it Smeese.
In France, it is respectful to address a police officer as "Monsieur" (Sir) or "Madame" (Ma'am). You can also use the term "Agent" followed by their rank if known, such as "Agent" or "Commissaire" (Commissioner). It is important to remain polite and respectful when addressing a French police officer.
monsieur is the translation of "sir" in french