Irregular changes of nouns from singular to plural

1. Children-children

Foot-foot

Teeth-teeth

Mouse-mouse

Man-man

Woman-woman

Note: the plural forms of compound words containing man and woman are also -men and -women, for example, one Englishman-two Englishmen.

But German is not a compound word, so the plural form is German; Bowman is a surname, and its plural is the Bowman family.

2. Single and plural homographs

For example: deer, sheep, fish, China in China, Japanese.

Note: Besides RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB, RMB. For example, one dollar-two dollars

3. collective noun in singular form is actually plural.

Such as people, police, cows, etc. It is plural, so we can't say a person, a policeman and a cow, but we can say a person, a policeman and a cow.

Nouns, such as English, British, French, Chinese, Japanese, etc. When used as a national term, it is used in the plural, for example:

China people are hardworking and brave.

The people of China are hardworking and brave.