The usage of es and s, what else?

Most words ending in O are added with es, but only S is added in the following two categories: (1) words ending in two vowels (2) some.

S. nouns with life (including animals and plants) ending with consonants +o, add es, and read /z/.

The plural form of nouns ending in o usually adds -es, for example, heroes, tomatos, tomatos, potatoes, Negroes, blacks and dingoes.

Only add -s to the plural forms of the following nouns: piano, photo, zoo, bamboo, radio, studio, cuckoo, solo, tobacco, kilogram, disco, cello.

Extended data:

Variation law of es and s

1. Add es after words representing living animals and plants, such as potato (potato), tomato (tomato), hero (hero) and Negro (black).

2. Add S to inanimate words, such as photos, pianos and radios.

Zoo, kg.

In this way, all foreign words are added with s. For example, solos, pianos, kilos and tohaccos all end in two vowels.

Add s at the end, such as zoo, bamboo, goo goo, radio, studio.

In addition, others have added es, such as echo and torpedo.