1. May I take your camera? 2. Can I use your phone? 3. Can I invite my friends to dinner? 4. May I speak to you, sir? 5. Dad, can we play in the garden? 6. Can we go to Helen's party? 7. I have no money. I have to go to the bank. 8. It's raining, you can't go out without an umbrella. 9. There is heavy traffic on the road. You must first carefully look, and then move on. 10. You can't play football at home, Jack. 11. My tooth hurts. I have to go to the dentist.