11. Functions of Modal Verbs 252. First identify the meaning of the modal verbs, then write a synonym. absence of possibility-offer- advice - necessity - giving/refusing permission - ability in the past - absence of necessity. obligation request - polite request absence probability. prohibition 1. This must be Jack's house. 2. It can't be 7 o'clock already! 3. Shall I open the door for you? 4. You should buy a new car. 5. You can't leave before 12 o'clock. probability (I think) 6. You'd better wash that immediately. 7. You may come in now. 8. Could I ask you a question? 9. He ought to be more careful. 10. There might be some apple pie left. 11. We've got to run to catch the bus. 12. Would you like me to give you a lift?............ 13. Can you pass me the salt, please? 14. I must go to the dentist's.. 15. You can leave your coat here. 16. You mustn't tell anyone what happened. 17. I'll answer the phone for you. 18. He could play the piano when he was young. 19. She needn't wait for us. 20. Do I have to come with you? 21. Neil may not remember my phone number.. 22. I didn't need to go to the bank yesterday. 23. You must listen to your parents announce and 24. He may know something about it. 253. Rewrite the sentences using the words given in bold type. 1. It isn't necessary to buy a ticket. NEED You don't need to buy a ticket. 7. You are not allowed to play in their garden. MUSTNI 8. It wasn't necessary for them to repair the car.