1、 Unit 9 When was it invented？Section A （1a-1c）学习目标A.知识目标 重点词汇：invent, calculator 重点句型：When was the car invented ? Who was it invented by ?B.能力目标 学会用被动语态谈论发明。C.情感目标 通过本课时的学习，懂得人类的科学发明创造了丰富的物质文明，激发同学们创造发明的意愿。学习过程Step 1 Ask the students to be familiar with the words below according to the pictures on c
2、omputer: personal computer, car, calculator, telephone, TV. Teach the new word: calculator.Step 2 Groupwork Look at the things below. In what order do you think they were invented ? Number them 【1-5】(1=first , 5=last). Students discuss with conversation 1a. Then check the answers. 教材详解：invent vt. 发明
3、 inventor n. 发明者 invention n. 发明 注意：invent 指发明以前就根本不存在的事物 discover vt. 发现 指发现了原来就存在但不为人知的东西 find out 发现 指经过了观察、调查 查明了事情的真相Step 3 Present the Passive Voice. Step 4 自觉预习（尝试练习 掌握新知）句型展示台1.A:小汽车什么时候发明的？_ _ the car invented ? B：它发明于1855. _ _ _ in 1855. Step 5 Check the answers in Step 4.Step 6 1b Listen
4、and match the inventions with the dates.Then check the answers.Step 7 1c PAIRWORK Step 8 水平能力形成性评价（1010分）一.根据句意及首字母提示补全单词，完成句子1.Can I borrow your c_ ?This math problem is too difficult.2.A car is such an important i_ for us.3.Do you know who the computer was i_ ?二.用所给词的适当形式填空4.Edison was a great _ .
5、 He _ a lot of useful things. He had over 1000 _ in his life .(invent)5.I think computers are _ (use) inventions in the world.6.English _ (speak) in China and other countries.三.句型转换（把主动语态变为被动语态） (3)情态动词+动词原形情态动词+be+v.-ed.方法：主动语态中的宾语作被动语态中的主语；谓语动词变成被动形式；by+人/inonat+地点。eg: The farm grows rice.Rice is
6、grown on the farm. 7.My classmates often laugh at me. I _ often _ at by my classmates.8.A young man caught the thief. The thief _ _ by a young man.9.Many people dont do it like this in China. It _ _ like this by many people in China. 10.We can plant the trees on the hill. The plant trees _ _ _on the hill.教/学反思：
