Exercise 1. Find nouns in the plural form.

Positions, news, box, seas, problems, clothes, level, bus, countries, women, phenomenon, money, crises, people, glass, class.

Exercise 2. Give the singular form.

Women, feet, children, analyses, data, news, glasses, leaves, knives, sheep, shorts, plays.

Exercise 3. Give the plural forms of the following nouns.

Bed, classroom, day, factory, teacher, map, student, picture, desk, president, match, text, page, tooth, advice, hero, man, mouse, lawyer.