Study the following examples

1. I've bought everything, so you... go shopping. 2. She has recovered and... stay in bed. 3. Tom gave me a letter to post. I... forget to post it. 4. Shall I turn on the light? - No, you.... It's still light in the room. 5. The work isn't urgent. You... do it today. 6. Must he speak to the manager? - No, he.... The matter isn't very urgent. 7. The meeting is very important. We... be late. 8. You... take an umbrella. It isn't going to rain. 9. Look after the books, please. You... lose them, 10.1... forget my keys or I won't get in. 11. You... bring sandwiches. We can stop at a cafe. 12. You... wear your best clothes. You can wear what you like. 13. You... make any noise going into the house. It's very late and everybody's asleep. 14. My room is a mess, but I... clean it before I go out tonight. I can do it in the morning. 15. Bill is in the darkroom developing the negatives of the photos he took on his last trip to Pern. You... open the door because the light will ruin the pictures. 16. You... exert yourself. You're still not fully recovered from your surgery. 17. Thanks goodness we... eat fish again tonight. Dad didn't catch any today. 18. He has retired. He... work any more. 19. We... check the figures again. I think they are right. 20. In this

school pupils... smoke. They... wear school uniform, but they... wear dirty clothes. 22. You... take a jacket. It's rather warm. 23. Sally and Dave... attend the meeting, but the sales staff... miss it, as several matters concern them.

2.5. MUST AND MAY