Irregular Plurals Quiz

Which of the following is an example of a singular noun that changes form when pluralized?

• Deer

• Aircraft

• Child

• Fish

What is the plural form of 'cactus'?

• Cacti

• Cactuses

• Cactae

• Cactii

Which of the following nouns has the same form in both singular and plural?

• Sheep

• Child

• Tooth

• Person

Which of these words can be both singular and plural, despite ending in 's'?

• Teeth

• Children

• Oxen

• Series

What is a key characteristic of irregular plurals that end in 's'?

• They are always singular.

• They are never used in singular form.

• They can be both singular and plural.

• They always indicate a plural form.