3 circle the correct words. 1 A: You don't have to shouldn't spend so many hours in front of the computer. Its bad for you. B: I know, but I have to I should finish this report. My boss wants it by 9 am tomorrow. 2 A: Is that my mobile phone ringing? B: Leave it. You mustn't don't have to talk on your mobile phone while you're driving. 3 A: Sam! You almost knocked over that vase! You must ought to be careful when you're playing the Wii! B: Oops! Sorry. 4 A: You may I must go now. We've finished for today. B: Thanks. I'll see you tomorrow. 5 A: I didn't get the chance to say goodbye to Zack before he left for the airport. B: Then, you have to I should send him a text message. 6 A: He's suffering from shoulder strain again. B: He really may I must see a doctor. 14A: Ben has to I should share hs laptop with his brother. B: Oh, poor him!
4Rewrite the sentences using modals. ink it's a bad idea to surf the Net for hours. 1 I 2 It's forbidden to use the telephone in the teacher's office. 3 You don't need to work overtime. 4 It's my strong advice to see a dermatologist for your skin rash. 5 It's a good idea to clean your mobile phone often