[法语] 法语中名词单数变复数的6种变法(英法对照)

In French, a noun is always either singular or plural. It is usually introduced by a determiner, which reflects the number of the noun.

★regular plural formation
As in English, the plural is formed by adding an -s to the singular form of the noun. Note, however, that the -s is not pronounced. In spoken language, the determiner is often the only indication that a noun is singular or plural.
Tex est un tatou. Tex et Tammy sont des tatous. Tex is an armadillo. Tex and Tammy are armadillos.

★nouns ending in -s, -x, -z in the singular
Nouns ending in -s, -x, or -z do not change in the plural. For example:
Tex a un long nez. Les tatous ont toujours de longs nez. Tex has a long nose. Armadillos always have long noses.
Joe-Bob est un écureuil. Les écureuils adorent les noix. Joe-Bob mange au moins une noix par jour. Joe-Bob is a squirrel. Squirrels adore nuts. Joe-Bob eats at least one nut every day.
Bette est une chatte. Les chats mangent des souris. Est-ce que Bette a jamais mangé une souris? Bette is a cat. Cats eat mice. Has Bette ever eaten a mouse?

★nouns ending in -al, -ail, -au, -eu, -eau, -ou in the singular
Nouns ending in -al, -ail, or -au in the singular end in -aux in the plural. For example:
Edouard est un animal distingué. Corey et Fiona ne sont pas des animaux, ce sont des insectes peu sociables! Edouard is a distinguished animal. Corey et Fiona are not animals. They are unsociable insects!

There are a few exceptions: un bal (ball, dance), des bals; un carnaval (carnival), des carnivals; un festival (festival), des festivals; un récital (recital), des récitals.