人教版九年级英语上册《When was it invented?》SectionA PPT课件下载(第1课时)，共54页。ObjectivesTo learn to understand and use the passive voice(past tense) be + v (ed).To learn to listen for the details.To learn to talk about the history of inventions.Listen again and answer the questions.Did grandma’s family have a car?Yes, they had a car.Did grandma’s family have a TV? Why?No, they didn’t have a TV, because they couldn’t afford one.Pair WorkMake a similar conversation with your partner using the 1b as a model.A: When was the TV invented?B: It was invented in 1927.A: Who was it invented by?B: It was invented by Baird.T: When was the telephone invented?S: It was invented in 1876.T: Who was it invented by?S: It was invented by Bell.A: What are they used for?B: They’re used for …What are the shoes with lights used for?They’re used for serving for really cold ice-cream.What are hot ice-cream scoops used for?They’re used for seeing in the dark.Read the passage and answer the questions.1. What is the subject for their school project?Small inventions that changed the world.2. What kind of invention does Roy think of?The zipper.3. Why does Roy think it is a great invention?Because it is often used in our daily lives.4. Who and when was the zipper invented?Whitcomb Judson invented it in 1893.5. When did the zipper become popular?Around 1917.Language Points1.invent v. 发明指经过认识和实践创造出前所未有的事物。►Edison invented the light bulb.爱迪生发明了电灯泡。invention和inventor都是名词， 前者意为“发明”，后者意为“发明家”。discover, invent和find都是动词, 它们的词义相近, 但是有区别:★discover意为“发现”, 指发现某种本来存在,但以前未被发现或未为人所知的事物或现象。►The lost bike was discovered at the bus stop.丢了的自行车发现在公共汽车站那儿。►Later I discovered that he was so kind.后来我发现他如此善良。★invent 意为“发明”, 指发明以前不存在的东西。►Do you know who invented the computer?你知道谁发明的电脑吗？★find 意为“找到, 发现”, 指偶然发现或几乎没有困难地发现。►I found some old photos in that drawer.我在那个抽屉里发现了一些旧照片。2. What are they used for? 它们是用来做什么的？be used for sth. /doing sth.意为“被用来做某事”，表示用途或目的，后接名词或动名词，相当于be used to do sth.►Clothes are used for keeping (= to keep) warm.►Wood can be used for building (= to build) houses.►The stick is used to write on the blackboard.used to do sth.意为“过去常常做某事”。►I used to smoke when I was young.use sth. to do sth.意为“使用某物来做某事”, 其被动结构为“sth. be used to do sth.”。 ►These knives are used to cut pies.be used as 意为“被用作……，被作为……使用”。►English is used as a foreign language in China.be used by 意为“被……使用”。►Rubbers are often used by students to correct mistakes.3. — Can you help me think of an invention?— My pleasure!My pleasure也可说成It’s a / my pleasure.或 A pleasure，意思是“我的荣幸；愿为你效劳；这是件愉快的事”。►— Will you please help me take the books to the classroom?请你帮我把这些书带到教室里去好吗？— My pleasure. / It's a pleasure. 愿为你效劳。pleasure n. 愉快；高兴►I will remember this meeting with pleasure.我会愉快地记着这次的会晤。►It is a pleasure to work with you. 和你一起工作真是件乐事。at (one’ s) pleasure 随便►You are free to come and go at your pleasure. 来去自由, 尊便。take pleasure in 以某事为乐，喜欢做某事with pleasure 愉快地，高兴地，没问题4. Well, you do seem to have a point …you do seem to have a point … 是个强调句，用“助动词do +谓语动词原形”的结构。► Do Stay for supper! 一定要留下吃晚饭！►He did come here yesterday. 他昨天的确来这儿了。(2) have a point 有道理►I guess you have a point there. 我想你说的有道理。►Strangely, both of them may have a point.奇怪的是, 两个人似乎都有道理。5. ...it mentioned that the zipper was...(1) mention表示“提到；提及”，是及物动词，其后接名词或代词作宾语时，无需用任何介词；另外注意不接双宾语。如：►Don’t mention this problem this evening. 今晚别提这个问题。►Nobody mentioned the time of this meeting. 谁也没有提到这次会议的时间。►He never mentioned his tall friend to me./ He never mentioned to me that he had a tall friend.他从未向我提及他有个女朋友。（2）若后接动词，要用动名词，不能用不定式。►Whenever I mention playing football, he says he’ s too busy.我一提起踢足球，他就说太忙。（3） 口语中说 Don’ t mention it. 主要用来回答感谢，有时也用来回答道歉。如：►A：Thank you very much. 多谢你了。B：Don’ t mention it. 不客气。►A：I’ m sorry to have troubled you. 对不起打扰你了。B：Don’ t mention it. 没关系。Homework1.Listen to 1b and 2b.2.Finish off the exercises.3.Make a conversation about some inventions.4.Role-play the conversation.... ... ...关键词：When was it invented? PPT课件免费下载，.PPTX格式； 本作品中主体文字及图片可替换修改，文字修改可直接点击文本框进行编辑，图片更改可选中图片后单击鼠标右键选择更换图片，也可根据自身需求增加和删除作品中的内容，源文件无水印。如认为该内容涉嫌侵权，可通过邮件提出书面通知，我们将及时处理。