Modal Rules
1. Which sentence is grammatically correct?
Obligation vs Prohibition
2. You _______ park here. It's a no-parking zone. (Choose the prohibition)
Past Deduction
3. She's not answering her phone. She _______ left it at home. (95% certain about the past)
No Obligation
4. You _______ come to the meeting if you're busy. It's optional.
Modal Combinations
5. Which sentence correctly expresses future ability?
Past Regret
6. I failed the exam. I _______ studied harder. (expressing regret)
Modal Questions
7. Which question form is correct?
Present Deduction
8. His lights are on. He _______ be at home. (logical deduction - 95% certain)
Possibility
9. It's cloudy. It _______ rain later. (expressing 50% possibility)
Polite Requests
10. Which is the MOST polite way to ask someone to help you?
Negative Deduction
11. That _______ be John at the door. He's in Paris this week. (95% certain negative)
Past Ability
12. When I was younger, I _______ run five miles without stopping.
Advice
13. You look tired. You _______ get some rest.
Necessity
14. We're out of milk. I _______ go to the store.
Past Possibility
15. I'm not sure where Tom is. He _______ gone to the library.