In most cases, to make a word into its plural you can simply add an “s” or an “es.” But some words are the same in both single and plural forms.
The plural of octopus is octopuses—not octopi.
Can you match the singular word to the correct plural version?
Singular | Plural |
foot deer half leaf louse hippopotamus mongoose mouse person scissors that tooth |
mongooses scissors lice people those teeth halves mice feet leaves deer hippopotami |