Noun (short for noun)

City, metropolis

City and city end with consonants and y, and y should be changed to I and es.

The following is the basic method of plural nouns (for your reference)

1, the basic method of changing nouns from singular to plural is as follows:

① Add s after singular nouns. Such as: map → map, boy → boy, horse → horse, table → table.

② Add es before the words ending in S, O, X, sh and ch, such as class → classes, box→box, hero → heroes, dish→dis, bench → bench.

[Note]: For a few words ending in O, only S is added in the plural. Such as: photo → photo, piano → piano.

(3) for nouns ending in consonants and y, change y into I and add es. Such as: family → family, city → city, party → party.

4 nouns ending in f or fe, change f or fe into v and add es. Such as: shelf → shelf, wolf → wolf, life → life, knife → knife.

2. Irregular changes: male → male, female → female, sheep → sheep, tooth → tooth, fish → fish, son → son, cow → cow, goose → goose.

Uncountable nouns generally have no plural form, so when describing their quantity, we should use related quantitative nouns. Such as: one bag of rice → two bags of rice, one piece of paper → three pieces of paper, one bottle of milk → five bottles of milk.