Add -s or -es to talk about more than one.
Quick tip: Most nouns add -s. After s, x, ch or sh, add -es.
For most nouns, just add -s to make them plural.
When the noun ends in a hissing sound, add -es.
Learn the irregular plurals: man→men, woman→women, child→children, foot→feet, tooth→teeth, person→people, fish→fish