DAY 1 Learning Opportunity A. Directions: Underline the complete verb in each of the sentences. And on the blank, write the use of the modal: ability, permission, obligation, or possibility. Example. Obligation 1. One should understand the operation of fireworks. 1. May I examine the contents of this Roman candle 2. A chemist can explain the secret of its multi-colored fire. 3. You could recognize calcium by its red flame.​