Teenagers should be allowed to choose their own clothes. Period 4 Self-checkLearing aims 1.如何谈论应该被允许或不被允许做的事情，并发表自己的观点。2.一般现在时、一般过去时、情态动词的被动语态构成。Learning points 1.词汇及短语 2.被动语态 Step 1 Review(含有情态动词的被动语态)主语+情态动词+be+动词的过去分词主语+情态动词+not+be+动词的过去分词情态动词+主语+be +动词的过去分词 ？练习：1）Ann被允许挑选自己的衣服。 2）十六岁的孩子被允许晚上跟朋友出去。 3)学生不允许开车。 4）青少年不允许喝酒。 Step 2 Show 1、Self-check 填空2. Reading阅读并回答问题1）What did they do lastyear?2）What job does the writer want to take when he grows older? 3）What does Tian Ge want to do? And how often? 4）How are the students on Friday afternoons? 5）Whats the main idea of this reading?Step 3 Feedback（ ）1. Stamps_by people for sending letters. A. use B. using C. used D. are used.（ ）2. Bike mustnt _ everywhere. A. be up B. be put C. put C. putting（ ）3. All trees must _well when it is dry. A. be water B. watering C. water D. be watered（ ）4. I _ to his house yesterday.A. invite B invited C. am invited D. was invited5.这本书是鲁迅写的。_6.这辆自行车能修吗？ _7.学校不允许学生用手机。_Step 4 Delevopment制定校规使用should be allowed to do/ should not allowed to do必须 1穿校服/完成作业/努力学习/参加各种体育活动小组学习 不能 2. 打耳眼和戴耳环/上网打游戏/开车/打架/上课听音乐/放学闲荡/上学迟到 _ 2