Plural nouns

Most nouns add -s in the plural: a book, two books. Nouns ending in -s, -sh, -ch or -x add -es: buses, dishes, boxes.

After a consonant, y becomes ies: a city, two cities; but a boy, two boys. Many nouns in -f or -fe take -ves: a knife, two knives.

Some plurals are irregular and must be learned: man, men; woman, women; child, children; person, people; foot, feet.