(
课件网) Unit 4 Don't eat in class. Section A（Grammar Focus~3c） 1.能运用祈使句： be on time, Don’t run in the hallway, Don’t fight, be quiet.... 2.能运用情态动词 must,have to。 -- Does he have to wear a uniform at school --Yes, he does. /No, he doesn’t. We must be on time. We have to be quiet in the library. Learning goals（学习目标） 01 重点短语 1.保持安静 _____ 2.听音乐 _____ 3.每天 _____ be/keep quiet listen to music every day 课前积累 02 重点句子 1.不要在走廊里奔跑。 _____ ____ in the hallways. 2.我们在课堂上可以戴帽子吗？ Can we_____ ___ ____ in class 3.他在学校必须要穿校服吗？ Does he_____ ___ wear a uniform at school Don't run wear a hat have to We can’t _____. We must _____. We have to _____. Can you list other rules in daily life At school In class At home We can play computer games. do homework in class. listen to the teachers in class. watch TV on school nights. read a book. wear hats in class. ride bikes at school. draw on the wall. eat anything in class. listen to music in class. We can’t John is new here. classroom dining hall library Can we _____ Don’t _____. No, we can’t. We must _____. arrive late for class be on time arrive late for class 对不起！ 老师，我迟到了。 以后要注意啊。回到座位上吧。 Revision Sorry, I’m late for class. Don’t arrive late for class. We must be on time for class. Can we eat in the classroom Can we wear a hat in class Do we have to wear a school uniform Can we run in the hallways Don’t run in the hallways. Don’t fight. What are the rules We must be on time for class. Can we eat in the classroom No, we can’t, but we can eat in the dining hall. Can we wear a hat in class Yes, we can. / No, we can’t. Does he have to wear a uniform at school Yes, he does. / No, he doesn’t. What do you have to do We have to be quiet in the library. 否定祈使句 情态动词can的一般疑问句及其答句 情态动词have to的一般疑问句及其答句 have to的特殊疑问句及其答句 询问规则 1. 肯定句： Let me help you. Let's play tennis. Be a good boy! Be quiet in the library. Open the door, please. ③ Let型： ② Be型： ① Do型： 祈使句的常见句型结构： 肯定句一般以动词原形开头，无时态和数的变化。 动词原形 (+ 宾语) + 其他. Be + 表语 + 其他. Let + 宾语 + 动词原形 + 其他. No talking. Never be late again! Don't let him go back. Let him not stand in the rain. Don't forget me. ④ 其他类型的否定祈使句： ③ Let型的否定式： ① Do型的否定式： 2. 否定句： No + V-ing /名词！ Never代替Don't来加强语气。 ② Be型的否定式： Don't be late. Don't be afraid. Don't + let + 宾语 + 动词原形 + 其他. Let + 宾语 + not + 动词原形 + 其他. Don't + be + 表语 + 其他. Don't + 动词原形(+ 宾语) + 其他. 要点 must与have to辨析（教材Grammar Focus） 【讲解】 词汇 含义及用法 否定形式 例句 must 意为“必须”，强调说话者 的主观意愿,只表示现在， 无人称和数的变化 mustn't （禁止； 不准） You must finish the homework before seven o'clock.你必须在七点以前 完成作业。 课堂探究 词汇 含义及用法 否定形式 例句 have to 意为“必须；不得不” ... ...
