📝 Created by: El Arby Ameur | 📅 August 2026 | 🌐 lesson.tn
📖 Estimated reading time: 8 minutes | Word count: ~1000 words
⚖️ Modal Verbs of Obligation: Must, Have To, Should
Level: A2-B1 | Focus: Expressing Obligation and Advice
Grammar
Modal Verbs
modal verbs
obligation
must have to
📌 MUST - Personal Obligation
I must finish this report. / You must see that movie!
📌 HAVE TO - External Obligation
I have to wear a uniform at work. / You have to stop at red lights.
📌 SHOULD - Advice
You should see a doctor. / You should exercise more.
Quick Comparison
| Modal | Meaning | Example |
|---|
| must | personal obligation / strong advice | I must go. |
| have to | external obligation (rules, laws) | I have to wear a uniform. |
| should | advice / recommendation | You should rest. |