Write the plural of the following nouns.

Hero, cargo, negro, potato, echo, volcano, mosquito, motto.

Common nouns ending in y preceded by a consonant form the plural by changing y into i and adding es without increasing the number of syllables.

Write the plural of the following nouns.

Lady, balcony, family, city, country, daisy, fairy, cherry, study, sky.

Some nouns ending in f and fe form the plural by changing f or fe into ves without increasing the number of syllables.

Write the plural of the following nouns.

Sheaf, loaf, beef, thief, calf, half, elf, shelf, self, wolf, life, knife, wife.

LESSON 79.

NUMBER.