4. Structure • Level 1
Obligation: Must vs. Have to
10 Questions • 3 Minutes
📖 Lesson: Obligation: Must vs. Have to
Must
- *Internal Obligation*: "I *must* call my mom." (I feel I should).
- *Written Rules*: "Passengers *must* wear belts."
Have To
- *External Obligation*: "I *have to* work." (Boss says so).
The Negative Difference (Crucial)
- *Mustn't*: PROHIBITION. "You *mustn't* smoke." (Don't do it!).
- *Don't Have To*: NO OBLIGATION. "You *don't have to* come." (You can if you want, but it's not needed).
📋 Practice Questions
10 questions from this quiz — preview them here, then take the interactive quiz above. Your full answer review with explanations unlocks when you finish the test.
1. You _____ smoke here. It's illegal.
- Adon't have to
- Bmustn't
- Chaven't to
- Dneedn't
2. I _____ work tomorrow. It's Sunday.
- Amustn't
- Bdon't have to
- Cmust
- Dhaven't
3. I _____ go. My mom is calling.
- Amust
- Bhave to
- Ccan
- Dmay
4. I _____ buy some milk. We have none.
- Amust
- Bhave to
- Ccan
- Dmay
5. You _____ wear a uniform at school.
- Amust
- Bhave to
- Cmay
- Dcan
6. You _____ come if you don't want to.
- Amustn't
- Bdon't have to
- Cshouldn't
- Dcan't
7. Drivers _____ stop at red lights.
- Amust
- Bcan
- Cmay
- Dneed
8. I _____ get up early yesterday.
- Amust
- Bhad to
- Chave to
- Dmusted
9. You _____ touch that! It's hot.
- Adon't have to
- Bmustn't
- Cneedn't
- Dhaven't
10. We _____ pay. It's free.
- Amustn't
- Bdon't have to
- Ccan't
- Dshouldn't
🔗 Keep Practicing
✅ Answer Review
Nice work finishing the test — here is every question with the correct answer and explanation.
1. You _____ smoke here. It's illegal.
- Adon't have to
- Bmustn't
- Chaven't to
- Dneedn't
Correct answer: B) mustn't
Prohibition.
2. I _____ work tomorrow. It's Sunday.
- Amustn't
- Bdon't have to
- Cmust
- Dhaven't
Correct answer: B) don't have to
Lack of obligation (Optional).
3. I _____ go. My mom is calling.
- Amust
- Bhave to
- Ccan
- Dmay
Correct answer: B) have to
External obligation.
4. I _____ buy some milk. We have none.
- Amust
- Bhave to
- Ccan
- Dmay
Correct answer: A) must
Internal necessity.
5. You _____ wear a uniform at school.
- Amust
- Bhave to
- Cmay
- Dcan
Correct answer: B) have to
Rule/Law.
6. You _____ come if you don't want to.
- Amustn't
- Bdon't have to
- Cshouldn't
- Dcan't
Correct answer: B) don't have to
Optional.
7. Drivers _____ stop at red lights.
- Amust
- Bcan
- Cmay
- Dneed
Correct answer: A) must
Law.
8. I _____ get up early yesterday.
- Amust
- Bhad to
- Chave to
- Dmusted
Correct answer: B) had to
Past of have to.
9. You _____ touch that! It's hot.
- Adon't have to
- Bmustn't
- Cneedn't
- Dhaven't
Correct answer: B) mustn't
Prohibition.
10. We _____ pay. It's free.
- Amustn't
- Bdon't have to
- Ccan't
- Dshouldn't
Correct answer: B) don't have to
Not necessary.