For the plural form of most nouns, add s.

• bottle – bottles
• cup – cups
• pencil – pencils
• desk – desks
• sticker – stickers
• window – windows

For nouns that end in ch, x, s, or s sounds, add es.

• box – boxes
• watch – watches
• moss – mosses
• bus – buses

For nouns ending in f or fe, change f to v and add es.

• wolf – wolves
• wife – wives
• leaf – leaves
• life – lives

Some nouns have different plural forms.

• child – children
• woman – women
• man – men
• mouse – mice
• goose – geese

Nouns ending in vowels like y or o do not have definite rules.

• baby – babies
• toy – toys
• kidney – kidneys
• potato – potatoes
• memo – memos
• stereo – stereos

A few nouns have the same singular and plural forms.

• sheep – sheep
• deer – deer
• series – series
• species – species

[Quiz 1.1]

Choose the correct form of the noun in each sentence.

1) I have three (child, children).
2) There are five (man, men) and one (woman, women).
3) (Baby, Babies) play with bottles as toys.
4) I put two big (potato, potatoes) in the lunch box.
5) A few men wear (watch, watches).
6) I put a (memo, memos) on the desk.
7) I saw a (mouse, mice) running by.
8) There are few (bus, buses) on the road today.

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