Unit 4 Don't eat in class. What’s the rule?Do my homework first when I get home.…What’s the rule?I must read a book before I can watch TV.…What’s the rule?Play basketball only on weekends.…on weekendsWhat’s the rule?I have to practice the violin for an hour after dinner.…after dinner, for an hourDo you think the rules in your family are right? Why or why not?Dear Dr. Know, ____ you help me? I’m not happy because there are too many rules at home. Every morning, I _____________ get up at six o’clock. At school, I _______ wear a school uniform, and I ______ keep my hair short. After school, Complete Zhao Pei’s letter to Dr. Know using have to / must, can or can’t. 3aCanmust / have tohave tomust can’tmust can’thave tocanI ______ play with my friends or watch TV because I ______ do my homework. I ______ relax on weekends either because I _______ learn to play the piano. I never have fun, what ______ I do? Zhao Pei Complete the chart with the rules in your home and school. 3bThings I have to doThings I can’t doI must get up before 6:30. I can’t go out on school nights. I have to keep my hair short. I can’t watch TV before I practice the piano.I have to wear the uniform at school.I can’t see friends on school days. Things I have to doPut an × for the rules that you think are unfair. 3bI must get up before 6:30.I have to keep my hair short. I have to wear the uniform at school.××Things I can’t doI can’t go out on school nights. I can’t watch TV before I practice the piano.I can’t see friends on school days. ×Write a letter to Dr. Know. Tell him about all the rules and how you feel about them. 3c思路点拨：介绍规则，就是写自己能做什么，不能做什么。...
