Mastering Modal Auxiliaries: Can, May, Must, and Should
Fifth graders can sharpen their skills using helper verbs like can, may, must, and should with interactive quizzes and instant feedback. Practicing these modal auxiliaries helps students express ability, permission, and obligation with confidence.
Choose your level
Same skill, different difficulty. Start where it feels right — you can switch any time.
Grade level quizzes
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
10 questions · Multiple choice
Modal auxiliaries are special helper verbs that show how necessary, possible, or allowed an action is. For example, "can" shows ability, "may" asks for permission, "must" shows a strong rule, and "should" gives advice. Look at this sentence: "You should brush your teeth." Here, "should" tells us that brushing your teeth is a good idea!
Practice this skill at another grade level
The same skill with easier or harder sentences.
Printable modal auxiliaries worksheets
Every Modal auxiliaries quiz on this page also downloads as a free printable worksheet with a PDF answer key — great for homework, review, or the classroom. Sign in and use the print button on any quiz, or download a whole Grade 5 grammar workbook at once with Pro.
Read something at this level
Grade 5 reading passages to enjoy alongside grammar practice — each one comes with comprehension questions and a quiz.
Frequently asked questions
What are modal auxiliaries?
Why do fifth graders review modal auxiliaries?
What is the difference between 'may' and 'can'?
How do PicoBuddy quizzes help with this skill?
Why Modal Auxiliaries Matter in 5th grade
Modal auxiliaries—such as can, may, must, and should—give nuance to student writing. By fifth grade, students are transitioning from simple sentence structures to more complex, persuasive writing. Understanding how these helping verbs change the meaning of a sentence helps students express degrees of certainty, obligation, and permission. For example, there is a big difference between saying "You can write" and "You must write."
Supporting Your Child's Grammar Journey
Reviewing this 4th grade skill ensures fifth graders are prepared for middle school writing tasks. You can reinforce this at home or in the classroom by:
- Discussing how rules are stated (e.g., using "must" vs. "should").
- Finding modal verbs in books or news articles together.
- Practicing expressing permission and ability during daily conversations.
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