Chapter 5 - B1 English Grammar – Modal Verbs: Nuance and Politeness – Ex 5
Modal verbs (can, could, may, might, must, have to, should, would) express ability, permission, obligation, advice, and possibility. At B1 level, you must understand their subtle differences, form questions and requests politely, and avoid common errors like using 'must not' vs. 'don’t have to'.
Key Modal Verbs and Uses
- Can / Could: ability (present/past), permission (Could you…?)
- May / Might: possibility, permission (formal)
- Must: strong obligation (internal), prohibition (must not)
- Have to: external obligation (rules, laws)
- Should / Ought to: advice, recommendation
Key tip: Modals are **always followed by a base verb** (no -s, -ing, or -to).
Critical Distinctions
- ❌ You must not eat here. → You are forbidden.
- ✅ You don’t have to eat here. → It’s optional.
- ❌ I can to swim. → ✅ I can swim. (No infinitive after modals)
- ❌ She musted go. → ✅ She had to go. (Modals have no past tense—use alternatives)
Advanced Usage
Polite Requests:
Could you…? / Would you mind…? / May I…?
Past Ability:
Could (general) / Was able to (specific success)
Future Ability:
Will be able to (not “will can”)
Past Obligation:
Had to (not “musted”)
When to Use Each Modal:
Ability → Can / Could
Permission → Can / Could / May
Obligation → Must / Have to
Advice → Should
Possibility → May / Might / Could
correct “You don’t have to come.” (It’s optional)
incorrect “You must not come.” (You’re forbidden)
How This Quiz Works
- 20 questions randomly selected from a pool of 50
- Tests all key modal verbs and their uses at B1 level
- Hints guide you without giving the answer
- Immediate feedback with specific explanations
- Click “Check Answers” to see the full answer key
- “Change Questions” gives you a new quiz
B1 Modal Verbs Quiz (20 Questions)
Answer Key with Explanations