九年级第6单元When was it invented?（整个单元的核心知识）知识结构分析Unit 6 When was it invented?学习目标：1学会使用含有被动语态的不同句型结构“When/ Where was it invented?” 和“What are they used for?- They are used for doing sth.”来谈论各种发明物的历史。2学习理解被动语态的含义。能够就不同的发明物与他人交流看法，发表自己的见解，并 陈述理 由。3了解到更多在世界上有重大意义的发明，并向那些伟大的发明家学习。一、日常用语（学生分小组训练）1. - When was the car invented？ -It was invented in 1985.2. -When were electric slippers invented？ -They were invented last year.3. -Who were they invented by？ -They were invented by Julie Thompson.4. -What are they used for？ -Theyre used for seeing in the dark.二重点短语(学生合作探究）. be used for 被用来做What is the book used for? 书是用来做什么的？ The book is used for reading. 书是用来读的 The plane is used for traveling. 飞机是用来旅行的.be used to doing sth 习惯于做某事3. according to 根据，按照4. in this way 这样5. give sb. some time to do sths 给某人一些时间做某事.The teacher gives the student two hours to do homework. 老师给同学们两个小时做作 业。6. help sb. do sth. 帮助某人做某事 Ill help you leave the island. 我将帮助你离开岛屿。7. by accident 偶然的, 碰巧。同义词组 是by chance，同义词是accidentally,反 词组是on purpose. e.g. he found a new way to solve the problem by accident. by mistake 错误的8. fall into 落入，陷入9. in the end= at last=finally 最后10. make sb. adj. 使某人make me happy 使我开心11. sb. callednamed 被叫作，被称作a chef called Black. 一个叫布莱克的厨师a doctor named Amy 一个叫艾米的医生12. sprinkle a lot of salt on chips 在薯片上洒大量的盐13. decide to do sth. 决定做某事I decide to taste the hot tea 我决定品尝热茶。14. notuntil 直到才You cant leave until I arrive. 直到我到了你才能走。I cant watch TV until I finish my home work. 直到我完成作业，我才能看电视。15. be discovered in 年代be discovered in 地方 The tea was discovered in China in 1610. 茶是在1610年在中国被发现的。16. over three thousand years 三千年以上17. produce a pleasant smell 产生一股令人愉快的气味18. over an open fire. 在明火上19. in sixth century 在第六世纪in nineteenth century. 在十九世纪三知识点讲解（跟踪训练并拓展练习）1 .I think the telephone was invented before the car.我认为电话在汽车之前发明的.(1) I think 后接的一个分句做I think 的宾语,这个分句称叫做宾语从句.(2)was invented 是被动语态.(3)invent 做动词,意为 “发明,创造”,其名词有两种形式:一种为inventor “发明者”;一种为invention “发明,创造”例如:Edison was a great inventor, he invented more than 1,000 inventions in his life.（4）discover意为“发现”，指发现的对象是 本来存在的。 find意为“找到”，强调结果。 invent意为“发明”，发明的对象是以前没 有的东西。2 .Its used for scooping really cold ice cream.它是用来舀十分冰冷的冰淇淋的.句型be used for 意为 “被用来做”,介词for表示用途,后接名词或动名词.如:(1) sweater is used for keeping warm.毛衣是用来保暖的.(2) The knife is used for cutting.小刀是用来切削东西的.3 、The custom said they werent salty enough.这个顾客说菜不够咸.(1)said 后是宾语从句,省略了that.当宾语从句主句用一般过去时,从句也要用过去的某种时态.如:He asked me whom I was waiting for. 他问我在等谁.(2)enough修饰形容词或副词时应后置.如:The little child was not old enough to go to school.这个小孩太小了,不能去上学.但enough 修饰名词时,可以放在名词之前,也可以放在名词之后.如:I have enough money to buy it.( I have money enough to buy it.)4.The potato chips were invented by mistake.由于错误,薯片被发明了.（1） Mistake 做名词,意为 “弄错,误解”如:You have made a foolish mistake.你犯了一个愚蠢的错误.（2） Mistake 作动词,意为 “弄错,误解”如:She didnt speak very clearly so I mistook what she said.她讲的不清楚,所以我误解了她的 话.（3）By mistake 意为 “错误地,弄错地”.I took his backpack by mistake. 我错拿了他的书包He put salt in her cup of tea by mistake.他错把盐放进她的茶里5. Although tea wasnt brought to the western world until 1610, this beverage was disco vered over three thousand years before that.虽然,茶直到1610年才传入西方世界,但是这种饮 料在三千多年前就被发现了.(1)although 作连词,意为 “虽然,尽管”,引导让步状语从句,我们不能根据汉语习惯.在后面使用连 词but,不过它可以与yet, still连用;若主从句的主语相同,且从句谓语含有动词be,可将从句主语和 动词be省略.如:Although (it was)snowing, it was not very cold.虽然在下雪,但是天气不是很冷.There is air around us, although we cant see it.尽管我们看不见,但是我们周围全是空气.Although (he is) quite young, he knows a lot.虽然他很年轻,但是他很懂事.(3) notuntil 意为 “直到才”until 引导一个时间状语从句.如He didnt go to bed until his father came home.直到他爸爸回家时他才睡觉.6. According to an ancient Chinese legend, the emperor Shen Nung discovered tea when he was boiling drinking water over an open air.根据中国古代的一个传说, 神农帝在户外的火上烧饮用水时发现了茶叶.(1) According to 是个短语介词,意为 “根据;依照”后接代词,名词或由疑问词以及 whether引出的名词性从句.如:According to the radio, it will rain tomorrow.根据收音机说,明天有雨.According to what you said just now, he was right then. 根据你刚才说的,那么他就对了.(2) 介词over 在此意为 “在正上方”而介词above指 “在的上方”;介词on指 “在 的上面”7. Some leaves from a nearby bush fell into the water and remained there for some time.一些叶子从附近的灌木丛落到水里.并在水里浸泡了一段时间.(1) leaf的复数形式为leaves(2)nearby adj. “附近的“，e.g. He works in a nearby factory.(3) remain 表示 “继续留在某处”如How long will you remain here? 你要在此地停留多久?(4) fall into “落入,陷入”如:He was drunk and fell into the water.他酒醉跌落水中.三、重点语法知识（精讲精练，当堂检测学生的运用能力）1. 被动语态谓语动词的语态表示句子的主语和谓语动作之间的关系：1）当句子的主语是谓语动作的执行者时，主、谓之间的关系称为主动语态；2）当句子的主语是谓语动作的承受者时，主、谓之间的关系称为被动语态。 例如： I teach English.（主动语态）我教英语。 Our English is taught b