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8 questions with a Robots theme plus a full answer key. Perfect for Grade 4 English.
⬇ Download WorksheetStudents will identify and use irregular plural nouns that do not follow the -s or -es rule.
After Q5, pause and ask students to look back at the passage. Challenge them to find every irregular plural noun Leo used on his mission and list them on a sticky note. This anchors the rule in the story context before students tackle Q6–Q8.
- Leo finds one ___. He finds two of them. Which word is correct?
- Leo sees one mouse near the circuit board. Then Leo spots two ___. Write the correct plural noun.
- Leo rescues one child. Then he rescues a second child. Leo has now rescued two ___.
...plus 5 more questions in the full worksheet
Instructions: Read each question carefully and choose or write the correct plural noun. Remember: some nouns have special plural forms that do NOT add -s or -es.
Standard: L.4.1
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About this English worksheet for Grade 4
Mastering irregular plurals in fourth grade solidifies foundational grammar skills required for more complex writing tasks, as students encounter these high-frequency exceptions regularly in reading and composition. Teachers can use this worksheet as a diagnostic tool to identify which irregular forms students struggle with, then target mini-lessons accordingly before assigning extended writing projects where accurate noun usage matters for clarity.
This printable English worksheet is designed for Grade 4 students and covers Irregular Plural Nouns. The Robots theme keeps kids engaged while they practice essential English skills. Every worksheet includes a full answer key making it easy for parents and teachers to check work instantly. Aligned to Common Core State Standards (CCSS) for Grade 4 English. Print-ready at US Letter size. No login required — download and print in seconds.
Last updated: April 2026
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