Irregular Plurals
Some nouns change form instead of adding -s.
Examples
- man → men
- child → children
- mouse → mice
Key rules
- Some nouns change their vowels: man → men, foot → feet, tooth → teeth, mouse → mice
- child → children and person → people are special forms
- Some nouns do not change: sheep, fish, series
- Never add -s to an already irregular plural
Common mistakes
- childs → children
- two mans → two men
💡 Tip: Learn irregular plurals in small groups, such as body words like foot and tooth.