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1、Unit 9 When was it invented.Section B 3a-4学案一教学准备Teaching Aims：1. 知识目标： Words and phrases Talk about the some modern inventions2能力目标：能在具体语境中正确运用被动语态。3情感目标：培养爱国主义精神。教学重点：重点词汇用法及一般过去时被动语态用法。二、资料准备：课本P20 SectionB3a 4 三、学习过程：Step One: 英汉互译:英汉互译：1) 偶然地；意外地 2 ) 根据；据所说 3）古代的；古老的 4）传说；传奇故事 5)落入；陷入 6）留下；被保留
2、7）注意到；察觉 8）产生；制造 9）令人愉快的 10）混合剂；混合 11）这样 12）飞碟；飞盘 13）面包店 14）投；扔；掷 15 晚的_ 16. 咸的_ 17 酸的_18 撒，洒_.19 chef_ 20. by mistake_ 21 make the customer happy_22 in the end_23. salty enough_ 24. sprinkle lots of sald_25. a chef named/ called George Crum _26. The customer thought the potatoes werent thin enough.
3、_27. Did you know potato chips were invented by mistake? _设计意图：学习新单词和短语，为阅读短文打好基础。Step Two：合作探究：1.I_(clean) my room every day. My room _(clean) every day.2.Lucy_(wash)her clothes just now. Her clothes_(wash) just now.3. I can _(repair) your bike in two hours. Your bike can_(repair)in two hours Step
4、Three用所给词的适当形式填空。1. Did you notice a girl _(read) over there?2. A car _(fall) into the river just now.3. The flowers have a _(please) smell.4. The _(mix) smells bad.5. I _(not come) back until he left.6. Who _(save) the girl? She _(save) by a PLA man.7. The _(leaf) on the trees turn yellow in autumn
5、.四：反馈达标： 单项选择：1. The bridge _ by the farmers themselves in 1982.A. built B. was builtC. buildD. was build 2. All the books will _ to the children who live in the small village.A. be sentB. sentC. be sendD. send3. Keys _ used for _ the doors.A. is, openingB. is, openedC. are, opening D. are, opened 4. My mother told me that my homework must _ on time.A. finishB. be finishC. be finishedD. finished 5. Where is Mary ? She _in the cinema an hour ago.A. saw B. was seen C. is seen D sees6.A half of the news _ in English.A. is writing B. writes C. are written D. is written五、教学反思：
