Irregular Nouns. Some nouns form heir plural by making changes within the words.
Examples:
SINGULAR PLURAL
child children
foot feet
goose geese
madam mesdames
man men
mouse mice
ox oxen
woman women
Some nouns, even though they end in "s," are always singular.
Examples:
SINGULAR SINGULAR
arthritis mathematics
economics molasses
ethics news
logistics politics
Some nouns, regardless of the final letter, are always plural.
Examples:
PLURAL PLURAL
acoustics scissors
athletics spectacles
cattle statistics
goods tactics
gymnastics thanks
proceeds
Other nouns use the same form for both the singular and the plural.
Examples:
SINGULAR PLURAL
corps corps
deer deer
gross gross
means means
series series
sheep sheep
