Irregular plural forms in French

Read more about how to use Irregular plural forms in French.
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Irregular plural forms

Here are some of the main irregular plural forms found in French:

SINGULAR PLURAL
Madame (Mrs.)
Mademoiselle (Miss)
Monsieur (Mr.)
Œil (eye)
Ciel (sky)
Aïeul (grandparent, ancestor)
Vieux, vieil (old)
Bail (lease)
Travail (work)
Vitrail (stained glass)
Mesdames
Mesdemoiselles
Messieurs
Yeux
Cieux
Aïeux (or Aïeuls)
Vieux
Baux
Travaux
Vitraux

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