A1. complete the following table using the words given below: must; mustn’t; can; can’t; have to; don’t have to; be allowed to; be not allowed to; should; shouldn’t; ought to; need; need nota a) it is necessary or important b) it is okay/ permitted c) it is a good idea (the correct thing to do) d) it is not necessary e) it is not okay/ it is prohibited f) it is not a good idea (not the correct thing) a2. choose the best form. 1. you mustn’t smoke in the classroom. 2. you mustn’t/needn’t make your report tomorrow. 3. (formal) whoever commits robbery shall/should be punished with rigorous imprisonment. 4. if you see anything unusual you shall/should call the police. 5. you shouldn’t/needn’t talk too loud; you’ll wake the baby. 6. you shouldn’t/needn’t talk so loud; i can hear you. 7. the doctor says you should/can stop smoking. 8. the doctor says you should/can go out. 9. we have to/must send these vat forms back before the end of the month: we are required to do so by law. 10. you have to/must phone home: it’s urgent. 11. you cannot/mustn’t smoke here (you are not allowed). 12. you cannot/mustn’t smoke here (you are forbidden to). a3. make up sentences of your own to say what people must do, can do, must not do. use different language structures.